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![[Ergo] Z Free Rail RIS Unit[For Airsoft M4/16 AEG/GBB Series]](http://www.sixmm.com/cdn/shop/products/Ergo_ZFreeRailRISUnit_ForAirsoftM416AEGGBBSeries_1.jpg?v=1668505582&width=4096)
Joint inapproprié pour system 7
The grip needs some shaving but other than that fits great into marui and cowcow grips
Fits really well into Double Eagle and Cyma m4s
It has a plastic slide, but perfect for upgrading
fits really well into ml and tti chamber