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 kit is a true drop-in gas piston conversion, installing easily in a few minutes with a minimum of tools or technical expertise.
Available for carbine, mid, and rifle length gas systems
For barrel diameters greater than .875"
Compatible with the following calibers: 223 Rem/5.56x45mm NATO, 5.45x39mm Russian, 7.62x39mm Russian, 6.5 Grendel, 6.8mm Rem SPC
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