An upper receiver for the one family of firearms allows for the use of a bolt of another firearm family in the firearm action. In the depicted embodiment, an AR-15 bolt and its carrier group are simple drop-in with only the addition of a sear plate, clamp, and an insert into the bolt carrier group. The depicted receiver is designed to also prevent its use on the semi-automatic variants of the MAC family.
US-10794647-B2
US-10794647-B2 • October 2020 • Firearms & Accessories
Bolt conversion apparatus for firearm and upper receiver for the same