Magpul Industries MIAD/MOE AA/AAA Storage Core, Fits the MIAD, MOE, MOE+, MOE-K2, And MOE AK Grips, Black MAG056-BLK Internal core unit for the MIAD Pistol Grip as well as the MOE" MOE Plus" MOE-K2" and MOE AK Grips. Designed to hold two (2) AA type batteries in a self contained" water resistant unit. Included internal spacer allows for rattle free storage of either (2) AAA or (2) N size batteries (commonly used for EOTech sights). Rubber cap has two sides with markings to identify spent batteries and can be opened with a push of the thumb.