Manticore Arms Shadow Flash Hider 1x2/28 TPI Black. The Shadow Flash Hider will clear any round up to 9mm in diameter (i.e. 300 Blackout 5.56mm .22LR etc) and is threaded 1/2 x 28 tpi. It is marked "MA" and "9mm" to denote that it is a 922r compliant part by Manticore Arms for any weapon up to 9mm caliber and comes with a crush washer. Specifications for Manticore Arms Shadow Flash Hider 1/2x28 TPI: Manufacturer: Manticore Arms Color: Black Caliber: 9mm Luger Fabric/Material: 8620 steel with Rockwell 50C heat treat Threads per Inch: 1/2x28 Length: 1.75 in Weight: 2.4 oz Features of Manticore Arms Shadow Flash Hider 1/2x28 TPI Material: 8620 steel with Rockwell 50C heat treat Finish: Black oxide Weight: 2.4 ounces Length: 1.75 inches Package Contents: Manticore Arms Shadow Flash Hider 1/2x28 TPI Manticore Arms MA-6490: Shadow Flash Hider Black 1x2/28 TPI