The IBN technique makes it possible for the rail by itself to act as being the barrel nut when torqued on to the rifle, entirely eradicating the need for any different steel barrel nut. M-LOK add-ons can be mounted anyplace along the URX 4?s length, rendering it Probably the most https://knightsarmamentm4quadrail42851.timeblog.net/62436606/kac-rail-secrets