G&G M4 Polymer Lower

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. This G&G M4 Polymer Lower Includes: G&G M4 Polymer Lower: Lightweight polymer construction, perfect for competition builds Fully assembled selector switch Trigger guard Pivot pin Compatible with: AirTac CRBN Upper AirTac x MAC CRBN Gearbox AirTac Aluminum Endcap All V2 accessories