Custom designed battery cap compatible with all L3 devices that utilize AA batteries as their power source, such as the PEQ2 (Not PEQ2A), PAQ4, PEQ5, LBS300 laser boresights, and many others. These caps have a large internal nipple to contact the battery. 

NOTE: THIS MODEL IS NOT COMPATIBLE WITH PEQ2A LASER DEVICES DUE TO A DIFFERENT BATTERY COMPARTMENT DESIGN