VG6 Precision Gamma Muzzle Device AR-15 9mm Luger 1.75 in 1/2x28 Nitride Black. It was designed using state of the art engineering techniques utilizing CFD (Computational Fluid Dynamics) and CAE (Computer Aided Engineering). This product is 100percent CNC machined for optimal performance. The VG6 GAMMA is a muzzle brake and compensator hybrid. It virtually eliminates recoil and minimizes muzzle movement. The unique combination of both braking and compensating features inspire shooter confidence and allows the shooter to make very fast follow up shots. The VG6 GAMMA has been tuned for versatility as well. Specifications for VG6 Precision AR-15 Gamma Muzzle Device: Manufacturer: VG6 Precision Color: Black Finish: Black Nitride - Satin Finish Bead Blasted Stainless Steel Black Nitride Fabric/Material: 17-4ph Heat Treated Stainless Steel Gun Make: AR Platform Gun Model: AR-15 Weight: 2.1 oz Included Accessories: Standard Condition: New Fit: Multi Package Contents: VG6 Precision AR-15 Gamma Muzzle Device Crush Washer What firearm models does the manufacturer say VG6 Precision AR-15 Gamma Muzzle Device is compatible with? The manufacturer says that VG6 Precision AR-15 Gamma Muzzle Device is compatible with AR-15VG6 Precision APVG200027A: Gamma Muzzle Device AR-15 9mm Luger 1.75 in 1/2x28 Nitride Black