Quarter Circle 10, THE AR Pistol Caliber BRAND. Leader in top of the line, dedicated AR15 Pistol Caliber parts. .40 S&W 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 .40 S&W magazines
8620 Steel Bolt
QPQ Nitride treated for maximum durability and wear resistance.
Heavy Duty Extractor
15 oz assembled weight.