A serial numbered lower receiver hosts the trigger group ... a GZP nickel-boron finish Dead Bolt GEN II +P Premium M16 bolt carrier group and an Armageddon Tactical GMS-15 charging handle.

The lower, or "lower receiver" part of a firearm, is the crucial part that contains all of the gun's operating parts, including the trigger group and the magazine port. (Under American law ...

The innovative SHRIKE 5.56 upper receiver is designed to fit any MIL-SPEC quality AR-15/M16/M4-type lower receiver and features a dual-feed system, allowing users to configure the SHRIKE 5.56 from ...