Buttstock with recoil plate and adapter can be used with any type of hunting guns and carbines. It mounts with adapter for certain carbine model. Most typically it used with Saiga and AKM.
Design feature of this product – spring (shock absorber) inside the body. Metal tube is spring loaded and after shot slightly moves inside the buttstock body partially damping the recoil pulse. With integrated spring it can reduce recoil down to 40%. And this is a lot for big calibers and allows you to shoot more tight and accurate groups.