QRC™ Upper Builder Kit.

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Usually Ships Within 3-5 Business Days

Product Description

QRC™ Upper Receiver w/ Lower Parts Kit, Stock, and Buffer Kit 

- avaliable while supplies last



- Caliber 5.56 NATO (.223 REM)

-16" Barrel with a 1:7 Twist Rate

- Overall length: 25" 

- No Rear Sight 

- Salt Bath Nitride MPI Bolt Carrier Group

- A2 Birdcage Flash Hider 1/2 x 28 


Lower Parts Kit: 


  • Hammer
  • Hammer Spring
  • Trigger 
  • Trigger Spring
  • Hammer & Trigger Pivot Pins (2)
  • Disconnector 
  • Disconnector Spring
  • Bolt Catch 
  • Bolt Catch Plunger 
  • Pivot Pin 
  • Buffer Retainer
  • Buffer Retainer Spring
  • Magazine Catch Button
  • Magazine Catch Spring
  • Magazine Catch 
  • Take Down Pin
  • Selector 
  • Selector Detent
  • Selector Detent Spring
  • Trigger Gaurd 
  • Trigger Gaurd Roll Pin
  • Takedown Detent Pin (2)
  • Takedown Detent Spring (2)
  • Grip Screw
  • Grip Washer
  • Pistol Grip 

Stock Kit: 

  • Bushmaster Stock
  • Buffer Tube
  • Buffer spring 
  • End Plate
  • Castle Nut 

Proudly Made In U.S.A. 


*No FFL required as this order does not include a lower receiver. 


⚠️WARNING: This product can expose you to chemicals including lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to - https://www.P65Warnings.ca.gov 


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