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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
Jacob W.
Great lower! Small next to the new skeletonized one.
Max P.
this lower is very light but sturdy. perfect for esg builds thank you airtac customs!
Justin
Amazing great quality
John M.
Don't overthink it and just buy it. This G&G lower has great fitment on my Retro Arms V2 Gearbox and all the parts I've test fitted so far fit perfectly without grinding/modding needed. Just waiting on my CRBN AEG Upper and some other airtac products and the build will be done.
dylan c.
Nice very compact build.
Can’t wait to try it out on the field !!!
Tom S.
Great fit on the carbon upper!
Vincent C.
Went with a black ops look. G&G polymer M4 lower keeps the weight down without compromise to quality.
Eric O.
Came in looking great with no dinks and feels solid!!
Brian S.
Best way to start a competitive build. Don't have to buy a whole G&G rifle just to gut everything and only use the lower receiver. Huge money saver!
owen b.
had super fast shipping and was amazing worked perfect for my euro build
Ash W.
A solid foundation to start!
Austin N.
Love it! Good quality!
Evan H.
Her is it with a fusion engine in it. Amazing lower. Probably gonna buy another one soon.
Aidan D.
In love with the lower next purchase is your carbon upper
Evan H.
The lower you can get. I you get the CRBN gearbox, you can put any engine in this lower. It's the universal lower.
Zaden H.
The best lower you could get out there
Charles
Mags fit snug. Perfect alignment. Fast delivery! 10/10
Dean
Awesome company will do more business with
Loi
Pretty solid lightweight but strong almost no Wobble unless u really force it
Dash P.
Great! One of the only places to get one, also cuts the weight way down and would 1000% recommend this.
Connor
These items were perfect and was simple to install
Cameron
It’s a great lower and I love the fact that airtac sells CM lowers because it makes searching the internet to find just a lower for your gun so much easier
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