Gear Knight’s Armament Co URX 4 Teaser Trailer Recoil Staff February 5, 2013 Join the Conversation Knight's Armament Co. (KAC) has released a teaser trailer for its new URX 4 free-float handguard. The URX 4 features the Keymod mounting system, continuous Picatinny top rail and an Integrated Barrel Nut (IBN). The IBN system torques the rail onto the weapon, and allows the rail to act as the barrel nut. In conjunction with the URX 4 KAC is developing a host of Keymod accessories including irons sights and panel kits. http://youtu.be/FKU1uqcvACw www.knightarmco.com Explore RECOILweb:SHOT SHOW 2014 MEDIA DAY CoverageMonday Morning Carry: Breakfast with a P9C Pt. 2War Rifle Re-Creation: OIF M4 CarbineAfterSHOT: Midwest Industries - Sentinel Concepts Signature Carbine