Gas piston upgrade for your AR-15. Switching to a gas piston operating system from a direct gas impingement one leads to a cleaner and cooler operating rifle. This should lead to fewer malfunctions and considerably more time between cleanings. The OPS-416 kit is a true drop-in gas piston conversion, installing easily in a few minutes with a minimum of tools or technical expertise. The OPS-416 is designed to function flawlessly on quality mil-spec guns (Bushmaster, Colt, Rock River, DPMS, Stag Arms, FN, Smith & Wesson, Olympic, Armalite, Saber Defense, etc.) in either full auto or semi auto with standard profile barrels measuring no greater than 1.00" outer diameter or less Available for carbine and mid length gas systems
For barrel diameters no greater than 1.00"
Compatible with the following calibers: 223 Rem/5.56x45mm NATO, 5.45x39mm Russian, 7.62x39mm Russian, 6.5 Grendel, 6.8mm Rem SPC
Suppressor and full-auto compatible
Solid Billet Bolt Carrier
High Heat Handguard