What's in the Box (1) 1.375-24 (Hub) Direct Thread Insert (1) PRS:30 Suppressor The PRS series is a serious contender when it comes to the strength-to-weight ratio of a silencer. If you want the lightest silencer possible with all the benefits of M-Kore Technology, but don t want to sacrifice sound reduction, the PRS is your choice. It s perfectly at home on your hunting, match, and even semi-auto rifles. You ll appreciate the lightweight on the mountain and in competition. And love it even more as you shoulder your rifle and notice the absence of excess muzzle weight. The PRS features a 7075 aluminum tube, core, and mount with a Grade 5 titanium thread insert to prevent galling. The use of aluminum is perfect for light to mid-duty use, plus, it keeps the price very affordable. Product Features M-Kore Technology For use on barrels 16" or longer Integrated carbon cutters for easy cleaning Left-hand threads from core to mount Disassembles with common tools Product Specifications Length : 7.9" Barrel Restriction : 16 Inches Outer Diameter : 1.75 Weight : 10.8 oz Color : Black Material : 7075 Aluminum Coating : Type 3 Hard Anodize Rate of Fire: 20 Rounds per Second - let cool to ambient temp.