QuarterCircle10 has released their latest in pistol caliber carbine AR-9 receivers with the new Blue Whistler Sig P320 pattern lower receiver.

KEY DETAILS:

  • Available as a stripped receiver (with QC10 Proprietary parts) or with a lower parts kit included
  • QC10 Blu Whistler (P320) Lower Receiver with Proprietary Parts (Ejector, Mag Catch and LRBHO Assembly)
  • Engineered for 9mm, SIG Magazines
  • Last Round Bolt Hold Open on Empty
  • 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
quatercircle10 blue whistler p320 9mm sig lower ar-9 ar9 pcc pistol caliber carbine
quatercircle10 blue whistler p320 9mm sig lower ar-9 ar9 pcc pistol caliber carbine

To learn more about QuarterCircle10. CLICK HERE