VG6 Precision VG6 Delta 556 Muzzle Device 5.56mm 1/2-28 Thread Black Nitride Black. The Delta 556 maintains great muzzle control characteristics through the large linear ports. This also gives it spectacular flash suppressing characteristics. The Delta 556 contains no chambers so gas is expelled more forward which reduces the concussion to the shooter although recoil mitigation will feel similar to that of an A2 birdcage. This is a great all around device for tactical competition or recreational shooters at a very affordable price. Specifications for VG6 Precision VG6 Delta 556 Muzzle Device: Manufacturer: VG6 Precision Color: Black Caliber: .224 Valkyrie .223 Remington Finish: Satin Fabric/Material: 17-4 Stainless Steel Threads per Inch: 1/2x28 Gun Make: AR Platform Gun Model: Universal Length: 2.21 in Weight: 2.5 oz Condition: New Fit: Multi Diameter: 0.75 in Features of VG6 Precision VG6 Delta 556 Muzzle Device 17-4ph Heat Treated Stainless Steel Surface Hardness: 68RC Caliber: 5.56mm/.223 Remington/.224 Valkyrie only Package Contents: VG6 Precision VG6 Delta 556 Muzzle Device Crush Washer What firearm models does the manufacturer say VG6 Precision VG6 Delta 556 Muzzle Device is compatible with? The manufacturer suggests that VG6 Precision VG6 Delta 556 Muzzle Device is compatible with UniversalVG6 Precision APVG200006A: VG6 Delta 556 Muzzle Device 5.56mm 1/2-28 Thread Black Nitride Black