Asa usual, Trijicon makes a product of good quality material which would hold up under realistic conditions. Unfortunately, it's not great when it comes to functionality w/o some help. I bought for an ACOG with reflex site (Trijicon). There's really not enough space to install over ACOG optic and have it seat properly. It's tough but not impossible to stretch over end (which is better than if it was too loose & just fall off) but then it slowly slips back and pops off. I ended up using a small, black zip-tie (for electronics) to hold it in place. If not, it would be lost w/ regular use on the first bump.
Pros: Quality materials
Cons: Application issues
This review was written in the old system and had content requirements that are different than reviews written today.