If your rifle has been over gassed or you want to make the recoil out of your rifle or pistol a bit more manageable, try one of our +5% recoil springs. In just 5 minutes with a quick spring swap, you will feel the difference that a tighter spring offers. Will fit the AK 47, AK 74, RPK and PSL variants of the AK platform. Please note that the higher rated the spring, the more of a chance of having an issue with functionality. Usually +5% is perfect for short barrel rifles and pistols, and +10% and up is better for 16 inch barrel rifles up to the +20% for the PSL and Dragunov