HK433
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The Heckler & Koch HK433 is a modular assault rifle chambered for 5.56×45mm which combines features of the G36 and the HK416 families of assault rifles. The HK433 was designed by Heckler & Koch to be familiar to operators with experience using the Heckler & Koch G36 and HK416 platforms. All controls are ambidextrous, and major components are modular, allowing for rifles to be configured in the field as needed. The Heckler & Koch HK437 chambered in
.300 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 Stat ...
and features a 7- and 9- inch barrel was originally announced alongside with the HK433 in 2017. In late 2022, the Ministry of the Interior, Municipal Affairs, Housing and Sports of the State of Schleswig-Holstein recently commissioned Heckler & Koch Germany to manufacture and supply the HK437. Apparently, the German Police in Schleswig-Holstein will get 60 rifles for training and 140 rifles for field operations.


History

The HK433 was first introduced at EnforceTac 2017 which went on the 1st and 2 March in
Nürnberg Nuremberg ( ; german: link=no, Nürnberg ; in the local East Franconian dialect: ''Nämberch'' ) is the second-largest city of the German state of Bavaria after its capital Munich, and its 518,370 (2019) inhabitants make it the 14th-largest ci ...
, Bavaria, Germany, after the HK433 was shown to a select number of people at the earlier SHOT Show in January. Heckler & Koch offered the HK433 along with the HK416 as a candidate for the German Bundeswehr's competition to select a new assault rifle. The HK G36, the Bundeswehr's standard assault rifle since 1997, is to be phased out and a replacement is planned to be phased in from 2020.


Design

The HK433 has multiple barrel lengths ranging from 11-, 12.5-, 14.5-, 16.5-, 18.9- or 20-inch. All of the barrels are cold hammer forged, hard chrome lined with a 178 mm (1 in 7 inch) right-hand twist, six-groove rifling. It features a short-stroke gas piston driven system similar to the Heckler & Koch G36 and HK416, with a gas block regulator adjustment located above the barrel. The non-reciprocating charging handle can be changed to operate from either side of the forestock of the rifle, but does not have a locking recess like the Heckler & Koch G3 family of weapons. All other primary controls are ambidextrous. It has an interchangeable barrel system and a folding adjustable buttstock with a three position cheek riser and a paddle-style magazine release. Side-folding the buttstock shortens the HK433 by . The monolithic upper receiver is made of aluminium alloy, and the lower receiver is made of polymer. The HK433 features a STANAG 4694 NATO Accessory Rail at 12 o'clock that is backwards-compatible with the STANAG 2324/MIL-STD-1913 Picatinny rail. At 6 o'clock it features the STANAG 2324/MIL-STD-1913 Picatinny rail. At the 3- and 9-o'clock positions the proprietary "HKey" accessory attachment system is used instead of the more commonly used
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 ...
or
KeyMod KeyMod is a universal interface system for firearm accessory components designed to supersede the MIL-STD-1913 accessory rails. The concept was first created by VLTOR Weapon Systems of Tucson, Arizona, and released through Noveske Rifleworks of Gr ...
systems. The empty weight of a HK433 Draft STANAG 4179 compliant box magazine is approximately .


Variants

Currently are three configurations of the HK433 and two configurations of the HK437 available:


Users

* :
Schleswig-Holstein Police Schleswig-Holstein Police (German: ''Landespolizei Schleswig-Holstein)'' is a state law-enforcement agency in Schleswig-Holstein, Germany. It is subordinated to the Schleswig-Holstein Ministry of the Interior, Municipal Affairs, Housing and Sport ...
- A contract of over 200 HK437 along with accessories was procured.


References


External links


Heckler & Koch: Product Overview - HK433

H&K HK433 at SHOT Show 2017

Heckler & Koch HK433 modular assault rifle
5.56 mm assault rifles 5.56×45mm NATO assault rifles Short stroke piston firearms Heckler & Koch rifles Post–Cold War weapons of Germany {{rifle-stub