Too easy to pass up - EOTech Drop In Replacement Laser Battery Cap for 512/552/518/558 Holographic Weapon Sights

Excellent way to add a laser to an already great red-dot; and without really adding any more weight/bulk to the fore rail. Easy to use and shares batteries with the red dot so more weight savings. Barely larger than the std. AA battery case. Easy to install. Why not? Flip it on; flip it off. It's there when you want it and completely unobtrusive when you don't. And if for any reason you want to, you can go back to the std. cap.