When installed, these buffers will give you less felt recoil, more muzzle stability, less action noise and will extend the service life of your weapon. This includes AKs, Valmets, Galils, and Mak 90s, just to name a few.
Installation takes less than a minute and can be done without any special tools.
What makes the kalashnikov action so reliable, is also what causes its inevitable downfall, the violent manner in which it works. Each time you fire your rifle the gas system propels the bolt carrier to the rear very violently, which generates a shock wave that is absorbed by the metal receiver. After a period of time, this repeated pounding causes the action itself to lose its structural integrity. The most notable side effect of this happening is the difficulty you have in controlling the weapon during rapid fire. By installing a Recoil Buffer you totally eliminate the metal to metal impact of the bolt carrier to the receiver and most of the action noise.