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Gibbz Arms MG4 AR-15 Side Charging Upper Receiver - Gen 3 Charging Handle

AR-15 Assembled Upper Receiver

Out of stock

This product ships from another warehouse location and not available at our retail store. Orders may take an additional 2-3 business days for processing.


The G4 Uppers come standard with a hard anodized black coating (MIL-SPEC MIL-A-8625 Type III).


Product Description

  • GIBBZ Arms Patented Left Side Non-reciprocating Charging Handle Pat. No. 9,310,146
  • Billet machined from 7075-T6 Aluminum.
  • Larger Shell deflector
  • Ejection port dust cover
  • Uses all Mil-Spec and most Custom Bolt Carriers without modification
  • Full 15 Slot Picatinny Rail
  • Rear Bolt carrier door to allow for easy bolt carrier removal and still keeping gasses in during operation (important for suppressed fire)
  • Compatible with Mil-Spec and most other lower receivers.
  • Included is our Enhanced Cam Pin which is optimized for our side charging upper with Melonite coating.
  • Charging handle cover for keeping operating gasses in (also important for suppressed fire)
  • Protected by Patent No. 9,310,146
  • Manufactured in the USA (Arizona) by GIBBZ Arms.
  • Weight: 15.2 oz.
  • Dimensions: 8.9 x 2.9 x 2.9 in


Please NOTE: 

  • You MUST use the G4 Enhanced Cam Pin in the G4 Side Charging Uppers! Use of a Standard Cam Pin will cause the Bolt Carrier Group to lock up in the G4 Upper Receiver and be VERY difficult to remove and could damage the Upper Receiver.
  • Upper not compatible with hand guards featuring anti-rotation tabs without modification.
  • Upper may not come with Strike Industries parts as shown in photo because of availability.
More Information
Product Type AR-15 Assembled Upper Receiver
Manufacturer Gibbz Arms
Option AR-15