Get both! The Omega™ 9K is an exceptionally versatile suppressor. The Omega Ks are the smallest, lightest, and quietest silencers in their respective classes. Full auto rated and usable with pistols, rifles, and submachine guns, the Omega K series offers extreme durability in an ultra compact package and is compatible with 9mm as well as subsonic and supersonic .300 BLK. With the fully welded, tubeless, minimalist Omega K, big sound suppression now comes in a tiny footprint. The silencer-optimized Raptor-SD™ features a ported shaft designed to redirect gasses down and forward, away from the shooter’s face when shooting suppressed. Its ambidextrous design allows rapid palm "blading" or finger-thumb charging of the weapon, ensuring the motion is fluid and fast from either strong or support side. The Raptor-SD is compatible with most AR15/M16-pattern rifles. The Omega 9K ships with the pre-installed spring and spring retainer for piston mounting on pistols as well as a 5/8 X 24 direct thread mount for use on subguns and rifles. No tools are required for installation or removal of mounts.