The lightweight, semi-automatic Rec7 Gen II operates on a one-piece 14-7 stainless steel piston with two position gas plug. This Barrett REC7 Gen II 6.8 SPC rifle features an 18" DMR, black receiver, Magpul MOE stock, Barrett muzzle brake, SDE defense trigger, flip up iron sights, KeyMod rail attachment, Barrett handguard, and one 20 round magazine.