We are currently in the process of upgrading our website. FREE SHIPPING while we figure things out.

.40 S&W Barrels

.40 S&W Barrels

.45 ACP Barrels

Quarter Circle 10, THE AR Pistol Caliber BRAND. Leader in top of the line, dedicated AR15 Pistol Caliber parts. .45 ACP Barrels

As low as $180.00
Availability: In stock
  • 4150 CMV steel

  • 1-in-16″ twist rate

  • .578-28 threading

  • QPQ Nitride treated

  • .75″ (medium) profile

  • Choice of Lengths


Note: Barrels are measured from the end of the muzzle to the end of the breech/feed ramp. Approximately 1″ of the barrel rests inside the upper receiver upon installation, resulting in an installed length of 1″ less than listed overall length.

*The installation of a pistol-caliber suppressor requires the use of a fixed barrel spacer. See your suppressor manufacturer for information on the requirements of your particular model.

Write Your Own Review
You're reviewing:.45 ACP Barrels