BRN-180 Uppers are available in .223 Wylde (optimized for Remington and NATO ammunition), .300 Blackout, and 7.62x39mm. The barrels, made from 4150 carbon steel and button rifled with a 1-8″ twist rate, come in pistol, carbine, and rifle lengths. These unique firearms are gaining popu...
The action had to be shortened slightly to work with standard AR lowers, but it doesn’t appear anything was lost when doing so. The fit between the BRN-180 upper and any of thelowerswe tried was superior to the fit of the original AR-180s, which are, to put it nicely, rather slop...