Tiger Rock Booster Flash Hider AR 9mm 1/2x36 Thread Pictch Silver Small. The aggressive design along with the multiple ports this flash hider will keep your rifle on target. Specifications for Tiger Rock AR 9mm Booster Flash Hider: Manufacturer: Tiger Rock Caliber: 9mm Luger Finish: Melonite Fabric/Material: Stainless Steel Threads per Inch: 1/2x36 Gun Make: AR Platform Weight: 2.5 oz Features of Tiger Rock AR 9mm Booster Flash Hider Aggressive design No porting at 6 o'clock position Package Contents: Tiger Rock AR 9mm Booster Flash Hider Jam Nut Tiger Rock MBK49S#: Booster Flash Hider AR 9mm 1/2x36 Thread Pictch Silver Small