The best part of the ACOG is that it is the most Soldier & Marine resistant optic ever made. The spectacularly stupid and abusing things those optics suffer happily must be seen to be believed. Uncovered optic? No biggie. Joes wiped moon dust from out of the objective using baby wipes, dirty socks, all kinds of shit, and only the real ham-fisted idiots ever managed to scratch the lens. The Trijicon lens pen works far better, unsurprisingly.
One of my joes dropped a TA11 ACOG equipped M249 off of a guard tower. Well, more accurately, he leaned the M249 up against the guard railing in a stupid way, and bumped it, and it fell off the tower. Same derp, same derp result. Thankfully it was clear with a sealed belt box and the feed tray closed.
Belt box broke off, IIRC it bent one of the bipod legs a bit, but the optic and weapon were fine. The ACOG did take a substantial hit on the side of the optic, and we had to destroy the cover for the windage adjustment to remove it. Worked fine though, and it even held zero which I wasn't expecting, especially considering the fragile nature of the feed tray cover, which the ACOG or any other optic mounts to on the M249.
Sold me on the ACOG though, that much is for sure. Yes, the LVPO's beat it in overall performance especially with a trained/familiarized shooter that knows that specific LVPO. But LVPO's service lives are measured in weeks sustaining use & abuse where ACOG's will survive for decades.
If you really want caps, the caps and tenebraex set made for the M150 TA31 RCO reportedly fit the TA02 as well, but the front cap mounts to the tenebraex so you'd have to keep that. Not sure about options for the 3.5x TA110 or other TA11 style models.
With the TA02, though, you can skip the eyebox problem if you forego the installation of a folding backup rear iron sight, and mount it further rearward to your preferred hold.