The Black Rain Ordnance Spec series is a line of AR15 rifles and pistols built to meet bid requirements for law enforcement and military personnel and as an affordable option for civilian use. The SPEC15 Carbine uses a direct impingement gas system, has a low profile adjustable gas block, and a Nickel Boron-coated BCG. It has a billet 7075 T6 aluminum upper and lower receiver, 4150 chormoly barrel and a 12" M-Lok hybrid handguard. This 5.56 model has crowned 16" barrel, Thordsen Customs "Featureless stock, and a black hardcoat anodized metal finish.