9mm NATO; .300 BLK rated, .350Legend, .357/.38 Special The S-9-Ti is optimized to reduce backpressure/flow gas out of the suppressor and away from the shooter. The S-9-Ti is a full auto-rated suppressor for the 9mm caliber round. Full auto-rated is defined as a suppressor that can withstand the sustained heat and pressure of a firearm in full auto mode. The S-9-Ti has a C-Series Cerakote coating making it hi-temp rated and ideal for suppressors. These are all fully-welded to maximize strength/durability. The S-9-Ti ships with a 1/2x28 direct thread adapter. Also Available in other thread pitches. A 3-lug adapter is in the works.