Complete Upper W/PMUR 9MM Assembly

Out of stock


Quarter Circle 10, THE AR Pistol Caliber BRAND. Leader in top of the line, dedicated AR15 Pistol Caliber parts. Complete Upper Receiver


Shipping & Returns

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

  • 9x19mm QPQ Nitride-Treated Barrel

  • Compatible with QC10 Ranger (GSF), Rider (CLT9MM), Blu Lightenin (Sig226), and Blu Whistler (Sig P320) Lower Receivers
  • QC10 Universal Panted 9x19mm Bolt 

  • MLOK Handguard

  • 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.