The perfect base for any CRBN or HPA build - the G&G M4 Polymer Lower allows you to start a new build without needing to buy a whole base gun!
It interfaces perfectly with our CRBN Uppers, CRBN Gearbox, and AirTac Aluminum endcap.
- Lightweight polymer construction, perfect for competition builds
- Fully assembled selector switch
- Trigger guard
- Mock bolt catch
- Pivot pin
- AirTac CRBN Upper
- AirTac x MAC CRBN Gearbox
- AirTac Aluminum Endcap
- All V2 accessories