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

QuarterCircle10-AR15 Glock Large Frame Lower

Glock Large Frame Lower Receiver

Replacement LRBHO and Ejector Kit for CLT9mm

Replacement LRBHO and Ejector Kit for CLT9mm

.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