HKP 416 10.4″ 5.56 Complete Upper Kit Complete
Each kit includes the complete upper assembly, bolt group, tungsten buffer, & high-reliability SS recoil spring. This upper kit is a complete gas piston HK 416 style upper assembly that will drop on your mil-spec lower or an STS 416 lower. Each barrel kit will work on any mil-spec lower. Each unit is test fitted on HK & mil-spec lowers for accuracy and compatibility.
Each US made 10.4″ upper receiver kit includes:
- Proven & reliable gas piston design
- 10.4″ 416R Stainless 1/7 twist 5.56 fully Nitrided barrel
- Muzzle end threaded 1/2×28 with A2 flash hider and crush washer
- Enhanced stainless steel barrel nut
- Newer ultra desirable updated 416 stainless steel vented” gas block
- True spec integrated bayonet lug & ambi sling loops on gas block
- Nitrided gas piston with gas piston rod assembly installed
- Proper HK 416/MR556 height upper receiver with forward assist
- Polymer ejection port door and assembly installed
- 416 spec bolt carrier
- HK 416/MR556 billeted quad rail (no unsightly welded locking tabs)
- Stainless steel enhanced buffer spring
- Tungsten filled buffer
No FFL required as the upper assembly is considered parts & not an FFL item.* Should not be used with a suppressor, unless it is a zero pressure suppressor *
