Quarter Circle 10, THE AR Pistol Caliber BRAND. Leader in top of the line, dedicated AR15 Pistol Caliber parts.
Shipping: All orders are shipped within 72 hours Monday -Thursday 6am - 4pm Arizona Time.
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
.45ACP QPQ Nitride-Treated Barrel
QC10 .45ACP 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.