Fortis Manufacturing Slipstream Brake 9mm 1/2x36 Threads Black. 0 Compatible 4140 Steel Nitride coated For the .223 / 5.56 1/2 x 28 TPI Comes with a crush washer made in specialized factories Specifications for Fortis Manufacturing Slipstream Brake 9mm 1/2x36 Threads: Manufacturer: Fortis Manufacturing Caliber: .350 Legend 9mm Luger Fabric/Material: Stainless Steel Threads per Inch: 1/2x36 Gun Make: AR Platform Gun Model: AR-15 Features of Fortis Manufacturing Slipstream Brake 9mm 1/2x36 Threads Control Shield 2.0 Compatible 4140 Steel Nitride coated For the .223 / 5.56 1/2 x 28 TPI Comes with a crush washer Package Contents: Fortis Manufacturing Slipstream Brake 9mm 1/2x36 Threads What firearm models does the manufacturer say Fortis Manufacturing Slipstream Brake 9mm 1/2x36 Threads is compatible with? The manufacturer says that Fortis Manufacturing Slipstream Brake 9mm 1/2x36 Threads is compatible with AR-15Fortis Manufacturing 9MM-SSMB-BLK-36: Slipstream Brake 9mm 1/2x36 Threads Black