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*WASHINGTON STATE RESIDENTS ONLY* LAST CALL - All MAGAZINES and IN-STORE firearms orders with Magazines over 10 rounds must be place by 11:59pm PST, June 28th, 2022

Quarter Circle 10 QC5 Side Charging 9mm AR Pistol - 7.5"

Pistol Caliber Carbine

In stock
Only 1 left

Also Available for In-Store Purchase Auburn, WA

FFL Required Before Shipping.

Please have your dealer email a copy of their FFL to [email protected] or fax it to 253-218-2998, referencing your name and order number.


The outstanding feature of the QC5 is that it is made for the use of 9x19mm MP5 magazines.  Available in a full range of hand guard and barrel lengths in either a rear or side charging receiver.  Users appreciate that in a QC10 complete build, all components are made for, not modified to work together.  This dependability is further strengthened by a life time warranty and dependable customer service. 


  • Engineered for 9x19mm MP5 magazines
  • Mil-Spec Lower parts
  • Tested Buffer Tube, Spring and Weight and SB Tactical A3 brace
  • Milled billet 7075-T6 Aluminum Lower Receiver
  • QC10 Milled billet 7075-T6 Aluminum Side Charging Upper Receiver
  • Type III Hard Coat Anodizing
  • Made For The AR Platform- Not Modified
  • Endless customization options
  • Test fired before it leaves the factory
  • Includes Carrying Case
  • DOJ Cable Lock Included
  • Quarter Circle parts are designed to work within mil-spec perimeters.  However, for optimum performance we recommend using QC10 parts for all your core elements, (receivers, bolt, barrel and adjustable buffer system).
  • Made for- Not Modified.  Every QC10 product is engineered specifically for pistol caliber ammunition, not modified from an existing platform, increasing functionality, reliability and overall performance.
More Information
SKU QC-QC5-SC-9-7.5
Product Type Pistol Caliber Carbine
Manufacturer Quarter Circle 10
Mount M-LOK
Barrel Length 7.5"
Caliber 9mm
Threaded Yes
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