The Ruger AR-556 is a semiautomatic

AR-15 style rifle An AR-15-style rifle is any lightweight semi-automatic rifle based on the Colt AR-15 design. The original ArmaLite AR-15 is a scaled-down derivative of Eugene Stoner's ArmaLite AR-10 design. The then Fairchild Engine and Airplane Corporation d ...

manufactured by U.S. firearms company Sturm, Ruger & Co. Introduced in 2014 as an entry-level AR-15 using a

direct impingement Direct impingement is a type of gas operation for a firearm that directs gas from a fired cartridge indirectly (through the barrel, through a gas block, and then through a gas tube) into the bolt carrier or slide assembly to cycle the action. Fir ...

action, with variants since being released such as the upgraded AR-556 MPR (multi-purpose rifle) in 2017 and the AR-556

pistol A pistol is a handgun, more specifically one with the chamber integral to its gun barrel, though in common usage the two terms are often used interchangeably. The English word was introduced in , when early handguns were produced in Europe, an ...

in 2019.

Overview

The standard model makes use of a traditional

with a carbine length gas system and has a cold hammer forged 4140 chrome-moly steel barrel with 1: twist rifling and a birdcage style

flash hider A flash suppressor, also known as a flash guard, flash eliminator, flash hider, or flash cone, is a muzzle device attached to the muzzle of a rifle that reduces its visible signature while firing by cooling or dispersing the burning gases that ...

. The bolt is machined from 9310 alloy steel, and the furniture included is a

CAR-15 The Colt Automatic Rifle-15 or CAR-15 is a family of M16 rifle–based firearms marketed by Colt in the 1960s and early 1970s. However, the term "CAR-15" is most commonly associated with the Colt Commando (AKA: XM177); these select-fire carbine ...

style handguard without aluminum heatshields, an M4 buttstock, and a Ruger designed pistol grip. The included sights are a fixed front sight post and a Ruger Rapid Deploy rear flip-up sight. The gas block and sight post design is proprietary to Ruger and includes a quick detach sling swivel socket and bayonet lug. The MPR model uses a mid-length gas system and a radial port

muzzle brake A muzzle brake or recoil compensator is a device connected to, or a feature integral to the construction of, the muzzle or barrel of a firearm or cannon that is intended to redirect a portion of propellant gases to counter recoil and unwanted ...

, and also includes a free-float handguard with

M-LOK M-LOK, for Modular Lock, is a firearm rail interface system developed and patented by Magpul Industries. The license is free-of-charge, but subject to an approval process. M-LOK allows for direct accessory attachment onto the "negative s ...

accessory slots and a continuous top

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 ...

, and either a Magpul or B5 Systems buttstock and pistol grip. The AR-556 Pistol has a barrel with a free float handguard with M-LOK slots and an SB Tactical SBA3 Pistol Stabilizing Brace, and is also available in

.300 AAC Blackout The .300 AAC Blackout (designated as the 300 BLK by the SAAMI and 300 AAC Blackout by the C.I.P. or 300 AAC Blackout'' C.I.P. TDCC sheet 300 ACC Blackout/ref>), also known as 7.62×35mm, is an intermediate cartridge developed in the United Sta ...

and

.350 Legend The .350 Legend (9×43 mm), also called 350 LGND, is a SAAMI-standardized straight-walled intermediate rifle cartridge developed by Winchester Repeating Arms. The cartridge was designed for use in American states that have specific regu ...

. All models include a standard 30 round

Magpul Magpul Industries Corporation is an American designer and manufacturer of high-tech polymer and composite firearms accessories like M-LOK. Magpul Industries takes its name from its first product, the MagPul (Magazine Puller), an accessory for th ...

PMAG in the box, except those sold in states with magazine capacity limits where a 10 round aluminum magazine is included.

References

External links

Ruger official website
{{ArmaLite AR-10 derivatives .300 BLK firearms 5.56×45mm NATO semi-automatic rifles Rifles of the United States ArmaLite AR-10 derivatives Weapons and ammunition introduced in 2014

Overview

See also

References

External links