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Quantity
1
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 ...
Reviews
4.8
31 ratings
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Perfect fit and light weight!
B
Buford · May 28, 2026
this lower is very light but sturdy. perfect for esg builds thank you airtac customs!
M
Max · April 25, 2025
Great lower! Small next to the new skeletonized one.