Due to ATF final rule 2021R-08F, all Quarter Circle 10 Full Pistol Builds will no longer come with pistol braces installed or included.
Please contact us if you have any questions before ordering.

Complete Upper W/PMUR 9MM Assembly

In stock


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

From $864.95

To $954.95

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.

Holiday Shipping: The QC10 Shop is closed from December 223rd-January 2nd. During this time, shipping will also be closed. You order will be processed on Jauary 2nd and will ship out the same or next week. Please double check your shipping information as well as get your FFL info in so that your order will not be delayed. 

Returns: Quarter Circle 10 offers a 30 day return, refund and exchange policy. See Details.

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Complete Upper W/PMUR 9MM Assembly
Complete Upper W/PMUR 9MM Assembly

In stock


    • Designed specifically for pistol-caliber AR builds

    • QC10 Billet Rear Charging Upper Receiver

    • 9x19mm QPQ Nitride-Treated Barrel

    • Compatible with QC10 Ranger (GSF), Rider (COLT), 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.