Good purchase - EOTech Drop In Replacement Laser Battery Cap for 512/552/518/558 Holographic Weapon Sights

I can't say I understand why EOTech discontinued these. I originally ordered it thinking it would fit my 557, which it did not. No big deal, called up Optics Planet's customer support and they had a 558 on it's way with the package price discount. Everything works, although I didn't buy it for the red laser. I wanted a reliable IR laser for NVG. The red laser is of little use with the holographic sight and is not visible it bright daylight. The IR laser is superb.