The standard features on the Mossberg MMR Carbine include a direct-impingement gas system for reliable, smooth operation; free-floating, button-rifled, carbon steel barrel with versatile 1:8 twist rate; removable rail-mounted, adjustable target sights (front sight is adjustable for elevation and rear sight for windage and elevation); single stage trigger; and black phosphate/anodized metal finishes for enhanced durability. A flat-top, full-length Picatinny rail provides for customization of your MMR with alternate sight systems or accessories. Stock options include a 6-position adjustable (10 1/2 - 14 1/4”) or fixed LOP (13 7/8”) combined with the slimmer profile, 13-inch handguard. Both feature a non-reflective black finish. The forward assist and dust cover are removed on this trimmed-down carbine.