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Quarter Circle 10 Side Charging Upper Reciever Top View

QC10 Side Charging Upper Receiver Blemished

Quarter Circle 10 GSF Side Charging Receiver Set

GSF Side Charging Receiver Set BLEMISHED

QC5 Blem Receiver Set Rear Charging

Quarter Circle 10, THE AR Pistol Caliber BRAND. Leader in top of the line, dedicated AR15 Pistol Caliber parts. QC5 Upper Lower Receiver Set

Availability: In stock
  • QC10 Stripped QC5 Lower Receiver with proprietary parts (cosmetic blem)

  • Accepts mil-spec receiver extension (buffer tube)

  • QC5 Rear Charging Upper Receiver (cosmetic blem)

  • No charging handle

  • Engineered for 9x19mm MP5 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 the AR Platform- Not Modified

  • Handguards with overlapping anti-rotation tabs may not be compatible with QC10 billet upper receivers, including Side Charging uppers.

  NOTE: The QC5 product line does not feature a Last Round Bolt Hold Open (LRBHO).  The Mp5 magazine does not have a provision to support it. 

Any orders containing lower receivers require a verified FFL dealer to make the transfer.

Lower receivers will not be shipped until QC10 has  your dealer's license on file.

Please contact your desired dealer about sending us a copy of  their license.

More Information
Size Large
Lower Receiver QC5
Upper Receiver Stripped
Lower Receiver Stripped
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