The IBN technique will allow the rail alone to act since the barrel nut when torqued onto the rifle, fully eradicating the necessity to get a separate metal barrel nut. M-LOK extras might be mounted any place alongside the URX four?s size, rendering it Probably the most person configurable designs https://waylondrcqb.wssblogs.com/26634428/5-easy-facts-about-knights-armament-m4-quad-rail-described