ABC RIFLE COMPANY AR-15 Linear Compensator Multi Ported Flash Hider .223 Remington/5.56x45mm NATO 1/2x28 Nitride Black. Featuring a multi-ported design and black nitride finish for corrosion resistance and durability this device is ideal for tactical or range use. The 1/2x28in thread pitch ensures compatibility with standard AR-15 barrels chambered in 5.56 NATO or .223 Rem. Side wrench flats allow for quick secure installation. Specifications for ABC RIFLE COMPANY AR-15 Linear Compensator Multi Ported Flash Hider: Manufacturer: ABC RIFLE COMPANY Color: Black Caliber: 5.56x45mm NATO .223 Remington Finish: Nitride Fabric/Material: 4140 Steel Threads per Inch: 1/2x28 Gun Make: AR Platform Gun Model: AR-15 Length: 2.5 in Weight: 3.46 oz Gun Type: Rifle Package Contents: ABC RIFLE COMPANY AR-15 Linear Compensator Multi Ported Flash Hider What firearm models does the manufacturer say ABC RIFLE COMPANY AR-15 Linear Compensator Multi Ported Flash Hider is compatible with? The manufacturer suggests that ABC RIFLE COMPANY AR-15 Linear Compensator Multi Ported Flash Hider is compatible with AR-15ABC RIFLE COMPANY MB15-MULTIPORT: AR-15 Linear Compensator Multi Ported Flash Hider .223 Remington/5.56x45mm NATO 1/2x28 Nitride Black