M2 Armament Group AR-15 A2 Style Bird Cage Muzzle Device Black. Precision-machined to exact military specifications for .30 caliber and large-bore barrels this duty-grade muzzle device delivers exceptional flash suppression muzzle rise compensation and rugged reliability for AR-10s .300 Blackout carbines and hard-use tactical rifles. Specifications for M2 Armament Group AR-15 A2 Style Bird Cage 5/8x24 Muzzle Device: Manufacturer: M2 Armament Group Color: Black Caliber: 5.56x45mm NATO .300 AAC Blackout 6.5mm Creedmoor .308 Winchester .223 Remington Finish: Oxide Fabric/Material: Steel Threads per Inch: 5/8x24 Gun Make: AR Platform Gun Model: AR-10 AR-15 Length: 1.75 in Outer Diameter: 0.86 in Weight: 1.8 oz Diameter: 0.86 in Package Contents: M2 Armament Group AR-15 A2 Style Bird Cage 5/8x24 Muzzle Device What firearm models does the manufacturer say M2 Armament Group AR-15 A2 Style Bird Cage 5/8x24 Muzzle Device is compatible with? The manufacturer says that M2 Armament Group AR-15 A2 Style Bird Cage 5/8x24 Muzzle Device is compatible with AR-15 AR-10M2 Armament Group M2-MD-5824: AR-15 A2 Style Bird Cage 5/8x24 Muzzle Device Black