These two silencers are awesome! We just got the 9k in. The Omega 9K is an exceptionally versatile suppressor, and is the smallest, lightest, and quietest silencer of its kind at just under 5?. Full-auto rated and usable with pistols, rifles, and submachine guns, the Omega 9K offers extreme durability in an ultra-compact package, and is compatible with both 9mm and 300BLK subsonic & supersonic ammo. With the fully-welded, tubeless, and minimalist Omega 9K - big sound suppression now comes in a tiny footprint.