SR-16 Mod 2.1 11.5″ Upper Receiver Kit | CRS Suppressor Package

First commercial release of the 11.5″ SR-16 Mod 2.1 upper receiver kit.

The 10.75″ KAC FF RAS 5 handguard was developed for use on SR-16 platforms, specifically optimized for KAC upper receivers with a notched receiver. The enhanced barrel nut interface and robust construction keep deflection minimal while enabling user-level barrel replacement.

The full-sized Combat Rifle Suppressor (CRS) was designed to virtually eliminate flash and system back pressure while exceeding the durability for which KAC signature reduction devices are known. Pressure Reduction Technology minimizes back pressure, resulting in a negligible increase in system gas—typically responsible for increased bolt carrier velocity and accelerated rate of fire.