*30% less weight with split rail than regular MLOK !
This AR-15 complete 338 Arc pistol length upper has a 10.5" heavy barrel with a parkerized finish, and features a 1:8 twist rate, with a pistol length gas system. It includes the 10" MLOK split rail, an M4 flat-top 7075 forged aluminum upper receiver, a bolt carrier group, a flash hider, and a rear charging handle. This 338 arc upper is compatible with any mil-spec AR-15 lower.
