Black Rifle Depot 5.25" .45 ACP Medium Black Nitride Blowback Barrel

5.25" .45 ACP Medium Black Nitride Barrel The 5.25" .45 ACP Barrel from Black Rifle Depot is a premium component crafted for blowback AR builds. Precision-machined from high-grade steel and treated with a durable black nitride (QPQ) finish, this medium-profile barrel offers excellent corrosion resistance, extended service life, and reliable feeding. Designed for blowback operation, it requires no gas system and is ideal for AR-45 pistols or SBR configurations. The .578x28 threaded muzzle accommodates most .45-caliber suppressors and muzzle devices. With a 1:16 twist rate, it provides optimal performance and stability for the .45 ACP cartridge. Manufactured in the USA by Tier 1 producers under ISO-9001 quality standards, this barrel meets strict tolerances and is built for performance and value. Features 5.25" barrel length - optimized for AR-45 pistols Blowback operation - no gas system required .578x28 threaded muzzle for suppressor compatibility Black nitride finish for corrosion and wear resistance 1:16 twist rate for accurate .45 ACP stabilization Medium contour for strength and balance Specifications Caliber: .45 ACP Barrel Length: 5.25" Gas System: Blowback Twist Rate: 1:16 RH Muzzle Thread: .578x28 Profile: Medium Finish: Black Nitride / Melonite Platform: AR-15 (.45 ACP configuration)