Diamondback Firearms OEM Replacement Barrel AR Platform AR-15 .300 AAC Blackout 16in Heavy Profile Pistol-Length 1-8 Twist 5/8 x 24 Thread Chrome Moly. 5/10/16in black nitride barrel from Diamondback Made of 4150 CMV with a pistol-length gas system. Specifications for Diamondback Firearms OEM Replacement .300 Blackout Barrel: Manufacturer: Diamondback Firearms Color: Black Nitride Finish: Nitride Caliber: .300 AAC Blackout Barrel Profile: Heavy Gas System Length: Pistol Length Threads per Inch: 5/8x24 Barrel Twist Rate: 1-8 Barrel Material: 4150 CMV Steel Gun Make: Diamondback Gun Model: AR-15 Package Contents: Diamondback Firearms OEM Replacement .300 Blackout Barrel What firearm models does the manufacturer say Diamondback Firearms OEM Replacement .300 Blackout Barrel is compatible with? The manufacturer suggests that Diamondback Firearms OEM Replacement .300 Blackout Barrel is compatible with AR-15Diamondback Firearms 300P16H50B8R: OEM Replacement Barrel AR Platform AR-15 .300 AAC Blackout 16in Heavy Profile Pistol-Length 1-8 Twist 5/8 x 24 Thread Chrome Moly Steel Black Nitride