Replacement AA battery compartment designed specifically for EOTech 512 and 552 holographic weapon sights manufactured before 2009. This black battery compartment restores full functionality to your optic.EOTech 512/552 Battery Compartment (Part #9-N1045)Compatible with Pre-2009 EOTech 512 and 552 models onlyUses standard AA batteries for reliable powerBlack finish matches original EOTech stylingDirect replacement for damaged or missing compartmentsEssential replacement part for maintaining your EOTech holographic sight's performance. Verify your EOTech model and manufacturing date before ordering to ensure proper compatibility.