Heckler & Koch HK433

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Heckler & Koch HK433
U.S. Green Berets soldier firing the HK433 assault rifle
Type	Assault rifle Carbine
Place of origin	Germany
Service history
In service	2024–present
Wars	Russo-Ukrainian war
Production history
Designer	Heckler & Koch
Designed	2017
Specifications
Mass	3.25 kg (7.2 lb) (11") 3.40 kg (7.5 lb) (14.5") 3.50 kg (7.7 lb) (16.5")
Length	577–843 mm (22.7–33.2 in) (11") 634–931 mm (25.0–36.7 in) (14.5") 703–971 mm (27.7–38.2 in) (16.5")
Barrel length	280 mm (11 in) 368 mm (14.5 in) 419 mm (16.5 in)
Width	81 mm (3.2 in)
Height	195 mm (7.7 in)
Cartridge	5.56×45mm NATO
Action	Gas-operated short-stroke piston, rotating bolt
Rate of fire	850 rounds/min
Muzzle velocity	800 m/s (2,600 ft/s) (11" barrel) 850 m/s (2,800 ft/s) (14.5" barrel) 875 m/s (2,870 ft/s) (16.5" barrel)
Effective firing range	500 m (550 yd)
Feed system	30-round detachable STANAG magazine
Sights	Iron sights and Picatinny rails for various optics

The Heckler & Koch HK433 is a modular assault rifle originally chambered for 5.56×45mm which combines features of the G36 and the HK416 families of assault rifles.

History

The HK433 was formally introduced at EnforceTac 2017 on 1 and 2 March in Nürnberg, Bavaria, Germany, after having been shown to a select number of people at SHOT Show in January.

Heckler & Koch offered the HK433 along with the HK416 as a candidate for the German Bundeswehr's competition (System Sturmgewehr Bundeswehr) to select a new assault rifle.

The HK433 has been proposed as a potential successor to the L85 as the next standard service rifle for the British Army under Project GRAYBURN.

Design details

The HK433 was designed by Heckler & Koch to be familiar to operators with experienced with the Heckler & Koch G36 and HK416. All controls are ambidextrous, and major components are modular, allowing for rifles to be configured in the field as needed.

The HK433 has multiple barrel lengths including 11, 12.5, 14.5, 16.5, 18.9 and 20 inches. 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 Side-folding the buttstock shortens the HK433 by 266–297 mm (10.5–11.7 in). The monolithic upper receiver is made of aluminium alloy, and the lower receiver is made of polymer. It is offered with the option of 2 different lower receivers: one with an AR-15 style magazine release button, and one with a paddle magazine release reminiscent of the G36.

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, which was used on early versions of the rifle, has been replaced by the more commonly used M-LOK system.

The empty weight of a HK433 Draft STANAG 4179 compliant box magazine is approximately 160 g (5.6 oz).

Variants

Configurations

Users

• Germany
  • Kommando Spezialkräfte
  • Schleswig-Holstein Police
• Ukraine
  • Main Directorate of Intelligence

References

External links

• Heckler & Koch: Product Overview - HK433
• H&K HK433 at SHOT Show 2017
• Heckler & Koch HK433 modular assault rifle