This video details the installation and functionality of a patent-pending, adjustable gas system for AK-series rifles developed in Ukraine. The system converts the AK from a long-stroke to a short-stroke piston and features a user-friendly, external four-position adjustable gas valve. This allows for precise gas regulation, significantly reducing recoil, optimizing performance with suppressors and various ammunition types, and enhancing controllability, especially in full-auto fire. The design aims for soldier-proof operation and ease of field adjustment without tools.
This review of the Barrett REC7 5.56mm highlights its robust construction, external piston operating system, and proprietary components. The rifle features a 16-inch cold hammer-forged barrel with a 1:7 twist rate, a two-position adjustable gas block for suppressed and unsuppressed use, and a Geissele SSA trigger. While praised for its fit and finish, the reviewer notes availability issues and a high MSRP.
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