Blem – Forged MG4 Side Charging Upper Receiver


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SKU: G4UR-MG4-1 Categories: ,


Cosmetic Blems

*shipping may take up to two weeks

*Unfortunately we don’t know when these will be made again.

– GIBBZ Arms Patented Left Side Non-reciprocating Charging Handle
– Protected by Patent No. 9,310,146
– Machined from our Custom Forging (7075 Aluminum).
– Shell deflector
– Ejection port dust cover
– Forward Assist
– 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)
– Manufactured in the USA (Arizona) by GIBBZ Arms.
– Weight: 14.5 oz. with Forward Assist and Dust Cover
– Dimensions: 8.9 x 2.9 x 2.9 in
* Upper may not come with Dust Cover or Forward Assist parts shown in photo because of availability. *

IMPORTANT!! You MUST use the G4 Enhanced Cam Pin in the MG4 Side Charging Uppers!
Use of a Standard Cam Pin will cause the Bolt Carrier Group to lock up in the MG4 Upper Receiver and be VERY difficult to remove and could damage the Upper Receiver.

Click HERE for instructions on how to change the cam pin or check out our YouTube VIDEO.



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