Out of stock
Shipping: All orders are shipped within 72 hours Monday - Friday 8am - 5pm PST
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.
A big focus for QC10 is to allow the shooter to match their sidearm with their PCC. Importantly this is not as simple as just adapting a magazine well. The Blu Lightenin (Sig 226) complete build is comprised from tested components, patented bolt technology and made for the use of the SIG226 magazine.
Milled billet 7075-T6 Aluminum Lower Receiver
QC10 Milled billet 7075-T6 Aluminum Rear Charging Upper Receiver
Type III Hard Coat Anodizing
Made For The AR Platform- Not Modified
16 Inch Barrel & Matching MLOK handguard
Tested Buffer Tube, Spring and Weight and Magpul MOE Collapsible Stock
Endless customization options
Test fired before it leaves the factory
Includes Carrying Case
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.
All orders containing a complete pistol must be shipped by 2 Day Air to a licensed, Federal Firearms Dealer (FFL). Please have your FFL email us a copy of their current Firearms license. Orders cannot be shipped without one.