The all new 12.5 inch M-LOK Handguard is our slimmest LR-308 series yet! Built for short and long barreled rifles, it extends further down the barrel, providing more rail space and more flexibility in accessory or hand placement. The free float design attaches directly to the receiver without coming into contact with the barrel or impacting barrel harmonics. The universal M-LOK rail platform accepts all standard M-LOK accessories. Available in black. The barrel nut is built specifically for use with low profile DPMS LR-308 pattern or compatible upper receivers. This rail is not compatible with the DPMS GII rifle. To confirm whether this rail will fit on your rifle, please click here to refer to our AR-10/AR-308/LR-308 Handguard Compatibility Guide. Please note that installation of a free float handguard requires additional gunsmithing tools and expertise. For questions regarding fitment or installation, please refer to our AR-15 quad rail guides and installation guides. Brand: Presma Includes: M-LOK free float quad rail handguard, steel barrel nut, castle nut, anti-rotation set screws, and Allen wrench Materials: A6061-T6 Aluminum Alloy Compatibility: Compatibility Guide. Not compatible with DPMS GII rifle, DPMS upper receivers prior to August 2009 (high profile top rail). Weight: 15 oz Length: 12.5 in Height: 2.5 in Internal Diameter: 1.54 in Color: Black Warranty: Lifetime