The primary goal is to make it work across the board so that you, the shooter, can enjoy versatility across your entire arsenal all at a budget friendly price while maintaining that rugged durability youve come to expect from YHM. This was the intent with the R9 9mm a suppressor capable of handling high volumes of fire and the ability to run other calibers such as .300 BLK and .308 Win. It was primarily focused on suppressing 9mm (specifically sub-machine guns and SBRs). The R9 is capable of being used on a handgun in conjuction with our Nielsen Booster Assembly. It features 1 3/8"-24 rear mounting threads and ships in the 1/2"-28 Direct Thread format. The suppressor body is a fully-welded tubeless design, made from 17-4 PH Stainless Steel for increased strength and corrosion resistance. Sound Levels- 9mm- 125 dB on 10.5" barrel, 123 dB on 4.25" barrel and on a .308 Win- 142 dB on 20" barrel.