Armalite, Inc.

Ar1510 LLC

Nathan A Brinkmeyer

Thomas L Thacker, Ii

Anthony A McVietty

The present disclosure provides, in part, new muzzle brakes, kits, and weapons systems (e.g., rifles) that allow for incremental adjustment of the ports of a muzzle brake so that the muzzle brake can be tuned for the user and firearm system. In certain aspects, the present disclosure provides muzzle brake plugs having an interior surface defining a plug bore that extends at least partially through the thickness of the muzzle brake plug and muzzle brakes having a plurality of side ports extending laterally away from a central bore and arranged to replaceably receive muzzle brake plugs. A bottom wall closing the plug bore of a muzzle brake plug can be selectively drilled or punch-out to create or enlarge an opening with the plug bore, thus allowing a shooter to tune the muzzle brake to the firearm system.

Tunable muzzle brake

This application discloses a firearm gas system that includes a gas block that defines a gas port and a passage that receives a gas tube and an orifice plate that defines at least two orifices, where the orifice plate is positioned between a gas port in the barrel and the gas port on the gas block and where the orifice plate is movable with respect to the gas ports in the barrel and gas block to selectively position one of the orifices between the gas ports in the barrel and gas block where the orifices in the orifice plate have different orifice sizes.

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Davenport, IA, United States of America

Nathan A Brinkmeyer