OEM replacement part for your Aimpoint optic.
We've all done it. Lost small parts. Battery covers, detents, o-rings, they all seem to evaporate somehow. Here is a factory Aimpoint Micro series battery cap for when yours gets lost or damaged. Get a new one for a clean coin slot to refresh the looks of your optic or an extra for some insurance against cross threading. Keep one handy in your spares kit.
Aimpoint Part # 12102 Spare