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Due to Measure 114, Rainier Arms will prioritize order shipments to Oregon state residents.

Quarter Circle 10 Blu Whistler (Sig Sauer P320) Stripped Lower Receiver

Lower Receiver

In stock
Only 4 left

Ships from Distribution Facility

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.



  • QC10 Blu Whistler (P320) Lower Receiver with Proprietary Parts (Ejector and Mag Catch)
  • Engineered for 9mm, SIG Magazines
  • Billet 7075-T6 Aluminum
  • Accepts Patented Universal 9MM Bolt
  • Type III Hard Coat Anodizing
  • Accepts Mil-spec Pistol/Carbine Buffer Tube Threaded Bolt Catch Pin
  • 12 oz stripped weight
More Information
Product Type Lower Receiver
Manufacturer Quarter Circle 10
Color Black
Caliber 9mm
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