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Quarter Circle 10 Blu Whistler (Sig Sauer P320) Rear Charging Receiver Set

Lower Receiver

In stock
Only 2 left

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.

Special Price $344.99 Regular Price $460.00

The QC10 receiver set represents the bare essentials for a quality pistol/carbine build.  The stripped lower and upper with proprietary parts form a solid foundation from which to completely customize a pistol or carbine.  Some customers purchase this kit as an upgrade to their existing platforms, while others try their hand at matching the performance of  a QC10 full build with other components. Regardless, the QC10 Receiver kit ensures the heart of the build is American.  Made for, not modified, with a connection to Texas that no one else can match.


  • QC10 Stripped P320 Lower Receiver with proprietary parts
  • Accepts mil-spec receiver extension (buffer tube)
  • P320 Rear Charging Upper Receiver
  • No charging handle
  • Engineered for 9mm SIG P320 Magazines 
  • Accepts QC10 Universal 9MM Bolt Assembly
  • Both recievers are milled billet 7075-T6 Aluminum Type III Hard Coat Anodizing
  • No Lower Parts Kit installed
  • Made For Not Modified
  • Handguards with overlapping anti-rotation tabs may not be compatible with QC10 billet upper receivers, including Side Charging uppers.
More Information
Product Type Lower Receiver
Manufacturer Quarter Circle 10
Color Black
Caliber 9mm

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