Magpul Industries MIAD/MOE CR123A Battery Storage Core, Fits the MIAD, MOE, MOE-K2, And MOE AK Grips, Black MAG055-BLK Internal core unit for the MIAD Pistol Grip as well as the MOE" MOE-K2" and MOE AK Grips. Designed to hold two (2) CR123A lithium type batteries in a self contained" water resistant unit. Rubber cap is captured to the unit and can be opened with a push of the thumb.