Description 5.56 NATO 1:7 Twist-MID Gas- (WAR SERIES) WAR SERIES- Ready for Anything and Everything, When you need it most. MOS-Tek’s Sub-Moa Guarantee/w Halworx ballistics ammunition. Match Grade 5R Rifling CRMOV-STEEL Medium Profile- Dimpled for Gas Block Finish (Matte) Nitride 5/8×24 Muzzle Thread
