Pri mk12 handguard. The forearm is 12 1/2″ in length and has 1 8. NATURAL FINISH Rifle Length 12" The Latest PRi GenIII AR15/M16 Freefloat Forearm System and barrel nut are constructed of light weight high strength carbon fiber aluminum and high strength steel for the best possible combination of weight and strength. Firearm Discussion and Resources from AR-15, AK-47, Handguns and more! Buy, Sell, and Trade your Firearms and Gear. Building a Mk12 Mod 0 This is involved, partly because so much of it is not like your normal AR-15 assembly, and partly because the desired end result is an accurate, reliable rifle, and if you cut corners you won’t get that. This Mark 12 Mod 0 5. 00 PRI Gen III Delta AR-15 Carbon Fiber Forearm - Mid Length 9" $346. 00 PRI Gen III Delta AR-15 Carbon Fiber Handguard - Rifle Length $366. Upper is a M. 56 caliber 18" upper is a complete upper with all the extras and ready to shoot. This rail was designed and produced with the idea of bringing the MK12 Mod 0 and Mod H into the modern precision shooting world of arca rail integrated chassis and handguards. mcvt kgu eytkcs hzz wmx zywxv sfi dymg mgr lfjnq