Daniel Defense M4A1 RIII 5.56mm NATO 16in Black Anodized Semi Automatic Modern Sporting Rifle - 32+1 Rounds - This lighter weight, fully ambidextrous version of the industry-standard DDM4 offers right- and left-handed shooters with even more flexibility and control. A 12.5in RIS III rail provides easy attachment/detachment of M-LOK accessories, and a mid-length gas system provides smooth, reliable cycling while also reducing perceived recoil and wear and tear on parts. This gun has a 14in barrel with a pinned muzzle device. Fully Ambidextrous Lower Mid-Length Gas System Black 12.5in RIS III M-LOK Rail Full-Latch Impact Plastic CNC Machined 7075-T6 Aluminum Receiver Ambi 2-Position Thumb Safety DD Soft Touch Furniture Stock/Grips Collapsible/Folding Stock