Look, battery box mounts to side RIS usually away from body. I run li-poly in the thing and have cut and glued some pre-formed plastic foam to fit perfectly. No rattles and the pre-form foam has air holes to assist in cooling battery since I am trigga happy. Great buy for for my M4 CQB/RIS with mock silencer.
Great PEQ for the price. I have it on my jg mp5 full metal ris and it fits perfectly. I use a small battery in this and i find that it rattles a bit when running around. The 4 out of five is because the plastic also feels a little weird but for 40 bucks i cant complain this is a solid product and i would recommend buying it if you need it.
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