The Heckler & Koch XM8 is a lightweight
assault rifle system developed from the late 1990s to early 2000s. The rifle was designed by German
small arms
A firearm is any type of gun designed to be readily carried and used by an individual. The term is legally defined further in different countries (see Legal definitions).
The first firearms originated in 10th-century China, when bamboo tubes c ...
manufacturer
Heckler & Koch
Heckler & Koch GmbH (HK; ) is a German defense manufacturing company that manufactures handguns, rifles, submachine guns, and grenade launchers. The company is located in Oberndorf am Neckar in the German state of Baden-Württemberg, and also ...
(H&K), and shares design and engineering with their
G36 rifle
The Heckler & Koch G36 (Gewehr 36) is a 5.56×45mm assault rifle designed in the early 1990s by German weapons manufacturer Heckler & Koch as a replacement for the heavier 7.62×51mm G3 battle rifle. It was accepted into service with the ''B ...
.
The XM8 design was originally part of the
Objective Individual Combat Weapon program
The Objective Individual Combat Weapon or OICW was the next-generation service rifle competition that was under development as part of the United States Army OICW program; the program was eventually discontinued without bringing the weapon out of ...
(OICW), which was developing a "smart"
grenade launcher
A grenade launcher is a weapon that fires a specially-designed large-caliber projectile, often with an explosive, smoke or gas warhead. Today, the term generally refers to a class of dedicated firearms firing unitary grenade cartridges. The mos ...
system with an underslung carbine rifle. The system was unable to meet performance and weight requirements and was eventually canceled. In the aftermath, the two portions of the OICW were separated, resulting in the XM8 and
XM25 projects.
While the XM8 was being considered by the
United States Army
The United States Army (USA) is the land service branch of the United States Armed Forces. It is one of the eight U.S. uniformed services, and is designated as the Army of the United States in the U.S. Constitution.Article II, section 2, cla ...
as a potential standard infantry rifle, to replace the
M4 carbine
The M4 carbine (officially Carbine, Caliber 5.56 mm, M4) is a 5.56×45mm NATO, gas-operated, magazine-fed carbine developed in the United States during the 1980s. It is a shortened version of the M16A2 assault rifle.
The M4 is extensively ...
, this project was put on hold in April 2005, and was
formally canceled on October 31 of that year. The weapon was adopted by the
Royal Malaysian Navy
The Royal Malaysian Navy (RMN, ms, Tentera Laut Diraja Malaysia; TLDM; Jawi: ) is the naval arm of the Malaysian Armed Forces. RMN is the main agency responsible for the country's maritime surveillance and defense operations. RMN's area of o ...
for its
PASKAL
The Pasukan Khas Laut (''Naval Special Warfare Forces,'' Jawi: ), commonly abbreviated to PASKAL, is the principal special operations force of the Royal Malaysian Navy.
PASKAL's task is to conduct small-unit maritime military operations that ...
special forces.
History
The U.S. Army's purpose in contracting for this prototype weapon was to provide replacement options for the
M16 rifle
The M16 rifle (officially designated Rifle, Caliber 5.56 mm, M16) is a family of military rifles adapted from the ArmaLite AR-15 rifle for the United States military. The original M16 rifle was a 5.56×45mm automatic rifle with a 20-roun ...
after the
XM29
The XM29 OICW (''Objective Individual Combat Weapon'') was a series of prototypes of a new type of assault rifle that fired 20 mm HE airbursting projectiles. The prototypes were developed as part of the Objective Individual Combat Weapon p ...
program ran into problems. The goal was a weapon that was cheaper, lighter, and more effective than the M16 and
M4 series of weapons. The XM8 was not just one weapon but a system which could be reconfigured with appropriate parts to be any one of several variants from a short-barreled personal defense weapon to a
bipod
A bipod is a V-shaped portable attachment that helps support and steady a device, usually a weapon such as a long gun or a mortar. The term comes from the Latin prefix ''bi-'' and Greek root ''pod'', meaning "two" and "foot" respectively.
Bipod ...
-equipped support weapon. It also included an integrated optical sight and IR laser aiming module/illuminator.
The XM8 was based on the rifle module of
Alliant Techsystems
Alliant Techsystems Inc. (ATK) was an American aerospace, defense, and sporting goods company with its headquarters in Arlington County, Virginia, in the United States. The company operated in 22 states, Puerto Rico, and other countries. ATK's ...
's
XM29 OICW
The XM29 OICW (''Objective Individual Combat Weapon'') was a series of prototypes of a new type of assault rifle that fired 20 mm HE airbursting projectiles. The prototypes were developed as part of the Objective Individual Combat Weapon p ...
project, of which the weapon mechanisms were the responsibility of H&K. Following the indefinite delay of the
Objective Individual Combat Weapon program
The Objective Individual Combat Weapon or OICW was the next-generation service rifle competition that was under development as part of the United States Army OICW program; the program was eventually discontinued without bringing the weapon out of ...
, the U.S. Army requested that the contractors design stand-alone weapons from the XM29's kinetic energy and high explosive modules.
The first 30 XM8 prototypes were delivered by November 2003 for preliminary testing. Later, at least 200 developmental prototypes were procured. Among the complaints during testing was that the battery life was too low for the weapon's powered sight system and some ergonomics issues. Two other key issues were reducing the weapon's weight and increasing the heat resistance of the handguard, which would start to melt after firing too many rounds. The main testing was largely completed, and the army pushed for funding for a large field test. However, in 2004 Congress denied $26 million funding for 7,000 rifles to do a wide scale test fielding of the XM8 in 2005. At that time, the rifle still had developmental goals that were incomplete, primarily associated with the weapon's weight; the battery life had been extended, and a more heat-resistant plastic handguard added. The earliest product brochure lists the target weight for the carbine variant at with the then current prototype at . The weight of the carbine prototype had since grown to according to a brochure released by HK and
General Dynamics
General Dynamics Corporation (GD) is an American publicly traded, aerospace and defense corporation headquartered in Reston, Virginia. As of 2020, it was the fifth-largest defense contractor in the world by arms sales, and 5th largest in the Uni ...
in January 2005.
During the same period, the Army came under pressure from other arms makers to open up the XM8 to competition. The main argument was that the weapon that was being adopted was a substantially different system than for the original competition that ATK and H&K had actually won (see
XM29
The XM29 OICW (''Objective Individual Combat Weapon'') was a series of prototypes of a new type of assault rifle that fired 20 mm HE airbursting projectiles. The prototypes were developed as part of the Objective Individual Combat Weapon p ...
). Other issues were that the army has a legislated obligation to prefer U.S.-based manufacturers, and that a previous agreement with
Colt Defense
Colt Defense LLC, together with its subsidiaries, is an American designer, developer and manufacturer of small arms weapons systems for individual soldiers and law enforcement personnel. It is headquartered in West Hartford, Connecticut. The compan ...
required the army to involve Colt in certain small-arms programs. The XM8 program was put on hold in 2004. The exact reason why this happened is a matter of debate; some combination of the aforementioned technical issues, funding restrictions, and outside pressure being involved.
In 2005, the Army issued a formal Request for Proposals (RFP) for the
OICW
The Objective Individual Combat Weapon or OICW was the next-generation service rifle competition that was under development as part of the United States Army OICW program; the program was eventually discontinued without bringing the weapon out of ...
Increment One family of weapons. This RFP gave manufacturers six months to develop and deliver prototype weapons with requirements very similar to the XM8 capabilities, but with the addition of a
squad automatic weapon
A squad automatic weapon (SAW), also known as a section automatic weapon or light support weapon (LSW), is a man-portable automatic firearm attached to infantry squads or sections as a source of rapid direct firepower. Weapons fulfilling this ...
(SAW) configuration. No XM8 prototypes have been shown that actually match the capabilities of the
M249
The M249 light machine gun (LMG), also known as the M249 Squad Automatic Weapon (SAW), which continues to be the manufacturer's designation, and formally written as Light Machine Gun, 5.56 mm, M249, is the American adaptation of the Belgian F ...
(e.g. fast barrel replacement, high sustained
rate of fire
Rate of fire is the frequency at which a specific weapon can fire or launch its projectiles. This can be influenced by several factors, including operator training level, mechanical limitations, ammunition availability, and weapon condition. In m ...
, belt feed). The OICW Increment One requirement for the SAW includes fast barrel replacement and high sustained rate of fire, but leaves the ammunition feed choice up to the manufacturer.
Funding for the
M320 grenade launcher
M320 Grenade Launcher Module (GLM) is the U.S. military's designation for a new single-shot 40 mm grenade launcher system to replace the M203 for the U.S. Army, while other services initially kept using the older M203. The M320 uses the same ...
, a single-shot underbarrel grenade launcher similar to the
M203
The M203 is a single-shot 40 mm under-barrel grenade launcher designed to attach to a rifle. It uses the same rounds as the older stand-alone M79 break-action grenade launcher, which utilizes the high-low propulsion system to keep recoil forces ...
that was originally intended for the XM8, was approved. The launcher is heavier than the M203, but does offer some advantages. The XM320 was designed for use with the existing inventory of M16s and M4s and is also compatible with the XM8. It can also be used as a stand-alone weapon.
As of July 19, 2005, the OICW Increment One RFP was put on an eight-week hold, with an indication given that the program was being restructured as a joint procurement program. On October 31, 2005, the OICW Increment One RFP was cancelled.
In an article in ''
Jane's Defence Weekly
''Jane's Defence Weekly'' (abbreviated as ''JDW'') is a weekly magazine reporting on military and corporate affairs, edited by Peter Felstead. It is one of a number of military-related publications named after John F. T. Jane, an Englishman who ...
'', April 26, 2006 (Vol 43, page 30) it is stated that "The US Army has again delayed the procurement of its future infantry weapons, this time for more than five years, and is working to field two interim guns in the meantime".
General Dynamics
General Dynamics Corporation (GD) is an American publicly traded, aerospace and defense corporation headquartered in Reston, Virginia. As of 2020, it was the fifth-largest defense contractor in the world by arms sales, and 5th largest in the Uni ...
was involved in latter stages and H&K had plans to produce the rifle at a plant in
Georgia
Georgia most commonly refers to:
* Georgia (country), a country in the Caucasus region of Eurasia
* Georgia (U.S. state), a state in the Southeast United States
Georgia may also refer to:
Places
Historical states and entities
* Related to the ...
. H&K was
British
British may refer to:
Peoples, culture, and language
* British people, nationals or natives of the United Kingdom, British Overseas Territories, and Crown Dependencies.
** Britishness, the British identity and common culture
* British English, ...
-owned at the start of the project, but was later bought back by a group of
German
German(s) may refer to:
* Germany (of or related to)
**Germania (historical use)
* Germans, citizens of Germany, people of German ancestry, or native speakers of the German language
** For citizens of Germany, see also German nationality law
**Ger ...
investors. Engineering work was done at facilities in the United States and Germany.
Near cancellation
The U.S. military's XM8 program was almost canceled in the autumn of 2005 after being suspended earlier that year, but was limited to the use of Marines. Had this program not been specified, the XM8 system may have faced competition from weapons such as from the
FN SCAR
The FN SCAR (Special Operations Forces Combat Assault Rifle) is a family of gas-operated short-stroke gas piston automatic rifles developed by Belgian manufacturer FN Herstal (FN) in 2004. It is constructed with modularity for the United States ...
,
Bushmaster ACR
The Adaptive Combat Rifle (ACR) is a modular assault rifle designed by Magpul Industries of Austin, Texas, and known initially as the Masada.
In late January 2008, Bushmaster Firearms International entered into a licensing agreement with Magpul ...
and
HK416
The Heckler & Koch HK416 is a gas-operated assault rifle chambered for the 5.56×45mm NATO cartridge. It is designed and manufactured by the German company Heckler & Koch.
Although the design is based on the AR-15 class of firearm (specifical ...
. It was later altered and entered as a candidate for the
SCAR
A scar (or scar tissue) is an area of fibrous tissue that replaces normal skin after an injury. Scars result from the biological process of wound repair in the skin, as well as in other organs, and tissues of the body. Thus, scarring is a na ...
competition but was unsuccessful.
Further testing
In autumn 2007 the XM8 was compared to other firearms in a 'dust test'.
The competition was based on two previous tests that were conducted in summer 2006 and summer 2007 before the latest test in the autumn of 2007. In the summer 2007 test, M16 rifles and M4 carbines recorded a total of 307 stoppages. In the autumn 2007 test, the XM8 recorded only 127 stoppages in 60,000 total rounds while the M4 carbine had 882.
The
FN SCAR
The FN SCAR (Special Operations Forces Combat Assault Rifle) is a family of gas-operated short-stroke gas piston automatic rifles developed by Belgian manufacturer FN Herstal (FN) in 2004. It is constructed with modularity for the United States ...
had 226 stoppages and the
HK416
The Heckler & Koch HK416 is a gas-operated assault rifle chambered for the 5.56×45mm NATO cartridge. It is designed and manufactured by the German company Heckler & Koch.
Although the design is based on the AR-15 class of firearm (specifical ...
had 233. The difference between the XM8, HK416, and FN SCAR was not statistically significant when correcting for the less reliable
STANAG magazine. However, the discrepancy of 575 stoppages between the summer and autumn 2007 tests of the M4 had officials looking into possible causes for the change such as different officials, seasons, and inadequate sample pool size but have stated that the conditions of the test were ostensibly the same.
Design
The XM8 is a
selective-fire
Selective fire is the capability of a weapon to be adjusted to fire in semi-automatic, fully automatic, and/or burst mode. The modes are chosen by means of a selector switch, which varies depending on the weapon's design. Some selective-fire we ...
5.56mm assault rifle, firing from a closed rotary bolt. Its design and functioning is similar to that of the
Heckler & Koch G36
The Heckler & Koch G36 (Gewehr 36) is a 5.56×45mm assault rifle designed in the early 1990s by German weapons manufacturer Heckler & Koch as a replacement for the heavier 7.62×51mm G3 battle rifle. It was accepted into service with the ''Bu ...
assault rifle, of which it is a derivative.
Materials and weight
The materials used to build the XM8 are almost entirely
composites, with the notable exception of the cold-hammer-forged steel barrel. Preliminary tests in desert and arctic conditions have shown the XM8 to be a rugged weapon, though some complaints arose.
Much of the expected cost and weight savings are from the weapon's electronic sight. The baseline XM8 carbine (with its integrated sight), for example, can be compared to an M4 carbine with a host of previous-generation electronic add-ons like the
AN/PEQ-2
The AN/PEQ-2 Infrared Target Pointer/Illuminator/Aiming Light (ITPIAL) is a laser sight for use on rifles fitted with a Picatinny rail. It was manufactured by Insight Technology.
History
The AN/PEQ-2 succeeded the AN/PAQ-4C, which was designed ...
,
Aimpoint CompM2
The CompM2 is a battery-powered, non-magnifying red dot type of reflex sight for firearms manufactured by Aimpoint AB. It was first introduced in the U.S. Armed Forces in 2000, designated as the M68 Close Combat Optic (M68 CCO; NSN: 1240-01-411-1 ...
,
Advanced Combat Optical Gunsight
The Advanced Combat Optical Gunsight (ACOG) is a series of prismatic telescopic sights manufactured by Trijicon. The ACOG was originally designed to be used on the M16 rifle and M4 carbine, but Trijicon has also developed ACOG accessories for ot ...
, and/or BUIS. Without the advantage of the next-generation combined electronics sight, the XM8 would be both heavier and more expensive than the firearms it was intended to replace.
Accessories
The XM8 abandoned the standard
Picatinny rail
The Picatinny rail ( or ), or Pic rail for short, also known as a MIL-STD-1913 rail, 1913 rail or STANAG 2324 rail (cancelled), is a military standard rail interface system that provides a mounting platform for firearm accessories. It was o ...
for attachment of weapon accessories, in favor of a new standard referred to as PCAP (Picatinny Combat Attachment Points), small oval holes on the forward grip. (A variant was designed with MIL-STD-1913 rails — XM8 R; and some early XM8 prototypes had rails.) PCAP is not backwards compatible with currently fielded attachments that use MIL-STD-1913 rails without using an adapter. The benefit of PCAP, however, is the precision of the accessory's connection with the body of the weapon; accessories utilizing Picatinny rails often need adjustment if they are removed and reattached. Additionally, most standard accessory functionality is built into the XM8. Where functionality was missing, it was anticipated that accessories would be redesigned to utilize PCAP. In the new OICW Increment One competition, the army has left the choice of attachment technology up to the manufacturer, with requirements built into the RFP as to the ability of sights to maintain their zero.
The M4 carbine barrel is and the XM8 barrel is but the rifles have the same overall length. Although a shorter barrel generally results in lower muzzle velocity,
Polygonal rifling
Polygonal rifling ( ) is a type of gun barrel rifling where the traditional sharp-edged "lands and grooves" are replaced by less pronounced "hills and valleys", so the barrel bore has a polygonal (usually hexagonal or octagonal) cross-sectional p ...
partially compensates for the loss of velocity from a shorter barrel. An electronic round counter was proposed for the XM8. The system would have tracked the number of rounds fired and the date and time of each shot. The data would then be accessed wirelessly by a device like a PDA. Another benefit would be to monitor unauthorized weapon use or corroborate field reports. Other features included completely ambidextrous controls and an integrated red dot/3x optical zoom
scope
Scope or scopes may refer to:
People with the surname
* Jamie Scope (born 1986), English footballer
* John T. Scopes (1900–1970), central figure in the Scopes Trial regarding the teaching of evolution
Arts, media, and entertainment
* Cinem ...
(later changed to a red dot/1x sight). However the
designated marksman
A designated marksman (DM), squad advanced marksman (AD) or squad designated marksman (SDM) is a military marksman role in an infantry squad. The term ''sniper'' was used in Soviet doctrine although the soldiers using the Dragunov SVD were the f ...
configuration used a 3.5x magnification scope.
Variants
![Navy_PASKAL_opearators_on_standby_during_57th_NDP](https://upload.wikimedia.org/wikipedia/commons/0/0d/Navy_PASKAL_opearators_on_standby_during_57th_NDP.JPG)
For much of its life, four different models were proposed: a compact PDW (personal defense weapon) with a barrel, a carbine with a barrel, a sniper and automatic rifle variant, both with barrels. In addition a
Light machine gun
A light machine gun (LMG) is a light-weight machine gun designed to be operated by a single infantryman, with or without an assistant, as an infantry support weapon. LMGs firing cartridges of the same caliber as the other riflemen of the sam ...
with a 100-round dual drum
Beta C-Mag
The Beta C-Mag is a 100-round capacity drum magazine manufactured by the Beta Company. It was designed by Jim Sullivan and first patented in 1987 and has been adapted for use in numerous firearms firing the 5.56×45mm NATO, 7.62×51mm NATO, a ...
is proposed. Accessories such as
optical sights, a
grenade launcher
A grenade launcher is a weapon that fires a specially-designed large-caliber projectile, often with an explosive, smoke or gas warhead. Today, the term generally refers to a class of dedicated firearms firing unitary grenade cartridges. The mos ...
, and a
bipod
A bipod is a V-shaped portable attachment that helps support and steady a device, usually a weapon such as a long gun or a mortar. The term comes from the Latin prefix ''bi-'' and Greek root ''pod'', meaning "two" and "foot" respectively.
Bipod ...
were integrated using a new system which allows for precision attachment (so that, for example, scopes do not have to be readjusted each time they are attached). Like the M4 and M16, the XM8 was chambered for the standard
5.56×45mm NATO
The 5.56×45mm NATO (official NATO nomenclature 5.56 NATO, but often pronounced "five-five-six") is a rimless bottlenecked intermediate cartridge family developed in the late 1970s in Belgium by FN Herstal. It consists of the SS109, L110, and ...
round and was normally equipped with a 30-round plastic
box magazine
A magazine is an ammunition storage and feeding device for a repeating firearm, either integral within the gun (internal/fixed magazine) or externally attached (detachable magazine). The magazine functions by holding several cartridges withi ...
also used in the
G36. Although, this meant that the magazine housing was not compatible with M4 and M16's metal
STANAG magazine without using an adaptor. A 100-round dual drum
Beta C-Mag
The Beta C-Mag is a 100-round capacity drum magazine manufactured by the Beta Company. It was designed by Jim Sullivan and first patented in 1987 and has been adapted for use in numerous firearms firing the 5.56×45mm NATO, 7.62×51mm NATO, a ...
style magazine could also be used.
One of the XM8's unique features was its modularity. In addition to attachments mentioned above, this modularity allowed for quick repairs, barrel length changes, and even caliber changes in the field. Along with its basic components, the XM8 would have complemented the
XM29
The XM29 OICW (''Objective Individual Combat Weapon'') was a series of prototypes of a new type of assault rifle that fired 20 mm HE airbursting projectiles. The prototypes were developed as part of the Objective Individual Combat Weapon p ...
, with such features as identical accessory mounts.
The number and type of variants in the family varied over its lifetime, this overview with three main versions is based from a press release in the early 2000s.
*XM8 compact carbine: barrel, PDW configuration, collapsing stock or buttcap;
muzzle velocity
Muzzle velocity is the speed of a projectile (bullet, pellet, slug, ball/shots or shell) with respect to the muzzle at the moment it leaves the end of a gun's barrel (i.e. the muzzle). Firearm muzzle velocities range from approximately to i ...
*XM8 carbine with XM320 grenade launcher: barrel; muzzle velocity
*Automatic rifle: barrel, muzzle velocity
*Designated marksman rifle: barrel, integrated folding bipod, 4X sight, 30/100-round magazine; muzzle velocity s
*Light machine gun: heavy barrel with integrated folding bipod, rate of fire 600-750 rpm
Usage
While the XM8 fell out of favor with the U.S. Armed Forces, Heckler & Koch sought to market the rifle globally. In the meantime, the
Malaysian Armed Forces
The Malaysian Armed Forces (: MAF; ms, Angkatan Tentera Malaysia; Jawi: ), are the armed forces of Malaysia, consists of three branches; the Malaysian Army, Royal Malaysian Navy and the Royal Malaysian Air Force. The number of MAF active pers ...
expressed interest in using the rifle and by 2007 openly stated its intention to purchase the XM8 rifle. By 2010, the
Royal Malaysian Navy
The Royal Malaysian Navy (RMN, ms, Tentera Laut Diraja Malaysia; TLDM; Jawi: ) is the naval arm of the Malaysian Armed Forces. RMN is the main agency responsible for the country's maritime surveillance and defense operations. RMN's area of o ...
special unit
PASKAL
The Pasukan Khas Laut (''Naval Special Warfare Forces,'' Jawi: ), commonly abbreviated to PASKAL, is the principal special operations force of the Royal Malaysian Navy.
PASKAL's task is to conduct small-unit maritime military operations that ...
began using the XM8 along with other Heckler & Koch assault rifles including the
HK416
The Heckler & Koch HK416 is a gas-operated assault rifle chambered for the 5.56×45mm NATO cartridge. It is designed and manufactured by the German company Heckler & Koch.
Although the design is based on the AR-15 class of firearm (specifical ...
and
G36.
See also
*
Adaptive Combat Rifle
The Adaptive Combat Rifle (ACR) is a modular assault rifle designed by Magpul Industries of Austin, Texas, and known initially as the Masada.
In late January 2008, Bushmaster Firearms International entered into a licensing agreement with Magpul ...
, modular rifle system.
*
AN-94
The AN-94 (Russian: 5,45-мм автомат Никонова обр. 1987 г. / АН-94 «Абака́н», GRAU designation 6P33) is a Russian assault rifle. The initials stand for ''Avtomat Nikonova'' model of 1994, after its chief designer ...
*
Barrett REC7
The Barrett REC7 (designation stands for "reliability-enhanced carbine") is an American firearm manufactured as a selective-fire fully-automatic and semi-automatic rifle by Barrett Firearms. It is an M4 carbine utilizing a short-stroke gas pisto ...
*
Beretta ARX160
The Beretta ARX160 is an Italian modular assault rifle manufactured by Beretta. Developed for the Italian Armed Forces as part of the ''Soldato Futuro'' (English: "Future Soldier") program, the ARX160 was launched in 2008 as a commercial weapon s ...
*
FN SCAR
The FN SCAR (Special Operations Forces Combat Assault Rifle) is a family of gas-operated short-stroke gas piston automatic rifles developed by Belgian manufacturer FN Herstal (FN) in 2004. It is constructed with modularity for the United States ...
*
XM25 CDTE
The XM25 Counter Defilade Target Engagement (CDTE) System, also known as the Punisher and Individual Semiautomatic Air Burst System was an airburst grenade launcher with programmable ammunition derived from the XM29 OICW. It was fielded to sol ...
*
XM5
The XM5 is the U.S. Army variant of the SIG MCX Spear, a .277 Fury, 6.8×51mm (.277 in), gas-operated reloading, gas-operated, magazine (firearms), magazine-fed, assault rifle designed by SIG Sauer for the Next Generation Squad Weapon Program in ...
References
External links
Picatinny article from 2004 about XM8 (.mil)
{{DEFAULTSORT:Heckler and Koch XM8
Weapons and ammunition introduced in 2003
5.56 mm assault rifles
Abandoned military projects of the United States
XM8
The Heckler & Koch XM8 is a lightweight assault rifle system developed from the late 1990s to early 2000s. The rifle was designed by German small arms manufacturer Heckler & Koch (H&K), and shares design and engineering with their G36 rifle.
...
Post–Cold War weapons of Germany
Trial and research firearms of Germany
Modular firearms