The IBN system allows the rail by itself to act given that the barrel nut when torqued onto the rifle, completely eliminating the necessity for a different steel barrel nut. M-LOK accessories may very well be mounted any where alongside the URX 4?s size, rendering it one of the most https://lukasxyulv.blog-gold.com/32703275/the-single-best-strategy-to-use-for-knights-armament-m4-quad-rail