Quarter Circle 10, THE AR Pistol Caliber BRAND. Leader in top of the line, dedicated AR15 Pistol Caliber parts. Complete Upper Receiver
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.
Designed specifically for pistol-caliber AR builds
QC10 Billet Rear Charging Upper Receiver
9x19mm QPQ Nitride-Treated Barrel
QC10 Universal Panted 9x19mm Bolt
QC10 Pistol Caliber Flash Hider
Made For the AR Platform- Not Modified
*This product is not compatible with DI gas systems or rifle-caliber bolts.