When the CF bought the EOTech, they were not yet owned by L3. I had one on my first tour in Afghanistan and it worked okay, but all four other ones we had went down for various reasons - two needed new battery compartments, two had the magic just leave. On my second tour my EOTech died within a month and I finished the tour with a Comp M4, no issues, no battery change. We use RDS for most courses now and the EOTech's come loose, the Comp M4 and M3 and PRO have torque knobs and stay on and keep zero.
EOTech claims to have improved this with the current production, but I have not used any of those yet.
The US army, most recently, bought only Aimpoint. The last contract was for over 500K sights. One million in service with US army alone.
EOTechs zero tends to drift with temperature as the laser refracts differently - the collimating hologram is supposed to stop this in theory, but we found differently over the last ten years particularly in the fall with morning frost and warm afternoons.
I'd read about the battery compartment issue before. I think it was mentioned on AR15.com that it had to do with recoil knocking something out of alignment due to the batteries being mounted longitudinally. It was apparently the primary reason the battery compartment was switched to transversal for the XPS/EXPS series.
I wasn't aware of the zero drift issue. It makes sense.




















































