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 Side Charging Upper Receiver
• 9x19mm QPQ Nitride-Treated barrel
• QC10 Universal 9x19mm bolt
• MLOK Handguard
• QC10 Non-reciprocating Charging Handle
• QC10 Pistol Caliber Flash Hider
• Test-fired at the factory
• Made For the AR Platform- Not Modified
*This product is not compatible with DI gas systems or rifle-caliber bolts*