The miad/moe battery storage core is an internal core unit for the miad as well as the moe moe+ moe-k2 and moe ak grips.It is designed to hold two aa type batteries in a self-contained water resistant unit.Included internal spacer provides rattle free storage of either aaa or n size batteries (commonly used for eotech sights).Rubber cap has two sides with marking to identify "spent" batteries and can be opened with a push of the thumb.Made in the usa.Firearm Model: AR10/AR15/M4/M16/M110/SR25Material: PolymerFinish: BlackFeatures: Rubber CapTexture Type: SmoothCapacity: 2 AA/AAA Batteries