The griffin Optimus is one of the very few silencers on the market that can be used with high powered rifles, but also pistols, and because its cleanable you can even use it with .22lr. For many people this might be the only silencer they ever need to buy. It is a very versatile silencer, but as a thick all-steel silencer, a little on the hefty side. There are many different configurations for different types of guns you might use it on. Uses silencerco style pistons for handgun use, and griffin or A2 muzzle devices for rifles.