QC10 is experiencing a delay in shipping due to COVID-19 please email firstname.lastname@example.org with any questions.
Quarter Circle 10, THE AR Pistol Caliber BRAND. Leader in top of the line, dedicated AR15 Pistol Caliber parts. .45 ACP Glock Style Bolt Assembly
Shipping: All orders are shipped within 72 hours Monday - Friday 8am - 5pm PST
Any order containing a lower receiver will not be shipped until we receive a copy of your FFL. Once received regular shipping policies apply. Submit your FFL Here.
Returns: Quarter Circle 10 offers a 30 day return, refund and exchange policy. See Details.
Advanced blowback design
Manufactured to function reliably with Glock .45 ACP magazines
8620 Steel Bolt
QPQ Nitride treated for maximum durability and wear resistance.
Heavy Duty Extractor