HKP 416 10.4" 5.56 Complete Upper Receiver Assembly

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 a STS 416. Finally an answer for all of those that have been wanting a 10.4" 416 styles upper but without the exceedingly high cost. Each barrel kit will work on any mil-spec lower. Each unit is test fitted on HK & mil-spec lowers for accuracy and compatibility. A great value at a great price. This unit is of the same lineage as the tried and true units with many 10,000's of rounds down range and advertised as the best buy at famous Las Vegas gun ranges. A perfect upper kit to use as your shooter and leave your true HK416 upper to collect value.

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 1/2x28 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

*With code HKPARTS416 you will get 10% off and free shipping on any style lower if you order directly from STS.

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 *