MWS .308 upper receiver with 16" stainless steel 1:11.25" twist .308 tactically flat matte blackened barrel, standard semi-auto bolt carrier group, tactical charging handle assembly, LM308MWS Defender lower with SOPMOD buttstock, two stage trigger group, ambi selector, and ambi mag release. Ships with a sling, operators manual, tactical adjustable rear sight, tactical front sight, (1) twenty round magazine, (2) heavy duty push button swivels (included as of 2011 orders), torque wrench/driver and (3) rail panels. You must have a current Federal Firearms License on file to purchase complete weapons or serialized parts. Direct Gas Impingement Overall length with SOPMOD collapsed: 35" Overall length with SOPMOD extended: 38" A2 Birdcage compensator 5/8 X 24 thread pitch