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HK 433

  • Firing pin safety (drop test as per NATO AC225/D14)
  • Capable of withstanding barrel obstructions as per NATO AC225/D14 (steel core, soft core and tracer ammunition)
  • Low-maintenance, reliable weapon system in the high- and low-temperature range according to NATO AC225/D14
  • The weapon can be set to safety in any loading state.
  • Over-the-beach (OTB) capability
  • Part of the modular multi-calibre platform with uniform and cross-calibre operating consistency
  • High degree of component uniformity within the multi-calibre family to increase efficiency in logistical processes of replenishment, spare parts stocking, repair and training costs
  • Combines the best properties from the G36 and HK416 in ergonomics, operation, precision, reliability, modularity and shooter safety
  • Operating concept with choice of preferred operating mode (G36/MP5 paddle design or HK416/AR-15 push-button design)
  • Highly ergonomic weapon design by means of a user-oriented arrangement of the operating elements and weapon components adaptable to the human physique
  • Non-reciprocating cocking handle with additional forward assist function. Reversible right/left without tools
  • Chamber Check Marker serves as visual check aid of bolt group position to reduce the risk of incorrect operation in stressful situations
  • Modular buttstock interface for the use of different buttstock designs: Standard shoulder buttstock (folds against receiver on right), tactical helmet buttstock for helmets with short protective visor (folds against receiver on right), helmet buttstock for helmets with long protective visor (pivots left/right)
  • Low sighting line to reduce exposure in protected position
  • NATO STANAG 4694 rail for mounting sights and sighting accessories
  • M-LOK or HKey QD handguard option
  • Day/night combat capability (image intensifier/thermal imaging)
  • Two-stage tool-free gas adjustment for the use of silencers
  • HK precision barrel made of cold hammer-forged and hard chrome-plated special steel
  • Interface for HK 40 mm add-on grenade launcher

Specifications

Caliber
5.56 mm x 45 NATO

 Magazine Capacity
10/20/30 Rd

 Modes of Fire
Semi-Auto / Full-Auto

 Muzzle Energy
1275 J

 Max Width
836 mm

Max Width
106 mm

 Magazine Weight
158 g

Weapon Weight
3.4 kg

 Barrel Length
11"

 Height
242 mm

Trigger Pull
30 - 40 N

 Muzzle Velocity
800 m/s

Chassis

The HK433 features a modular receiver system that combines a lightweight aluminum upper with a polymer lower, offering modern accessories and ergonomic components.

Operation

It operates using a gas-operated, short-stroke piston system with a rotating bolt, designed to deliver reliable cycling and consistent performance across varying conditions.

Slide

Rather than using a pistol-style slide, the HK433 employs a reciprocating bolt carrier group within the upper receiver to extract spent casings and chamber fresh rounds during firing.

Maintenance

Maintenance involves safely clearing the rifle, cleaning and lightly lubricating the bolt carrier group, barrel, and gas system to help ensure dependable operation.