The KNS Precision Adjustable Gas Piston System SLR-107UR is a field-proven solution for taming the over-gassed nature of AK-pattern rifles. If you're running an AK-style gun and watching your brass disappear downrange beyond 15 feet, your rifle is likely suffering from excessive gas system pressure—a common trait that accelerates wear on bolts, carriers, and other internal components. This adjustable gas piston lets you dial in the right amount of gas flow for your specific rifle and ammunition, extending service life and improving reliability without sacrificing function.
Built to work with your existing gas block, the KNS system is designed for quick installation in about 10 minutes with standard tools—no gunsmith required. The SLR-107UR configuration supports large-caliber cartridges including 7.62x39mm, .308 Winchester, and 7.62x54R, making it ideal for Mosin-Nagant-pattern rifles like the VEPR, PSL, and M92, as well as other AK-pattern rifles chambered in those rounds. The adjustable piston design gives you precise control over gas flow, helping reduce bolt carrier velocity and recoil impulse to more reasonable levels.
For shooters running AK clones at the range or in the field, an adjustable gas piston is one of the most practical upgrades you can make. Excessive gas wear compounds over time, and controlling it now means your rifle will run cleaner, shoot softer, and last longer. KNS Precision's reputation in the AK community is built on solving real problems that factory systems overlook—and this piston system is a prime example.
