This AR-15 complete 9MM upper has a 16" M4 Contour Barrel with a black nitride finish, and features a 1:10 twist rate, with a blow back gas system. It includes a 15" MLOK rail, a branded M4 flat-top billet upper receiver, a bolt carrier group, a flash hider, and a gen 2 (patent pending) right-side charging handle. This features the new handguard. This 9MM upper is compatible with any mil-spec AR-9 lower.
