Worth every penny - Trijicon ACOG 4x32 Scope w/ Chevron BAC Flattop Reticle & Flat Top Adapter

Specific Use:
It was designed specifially to be used on a milspec M4, meaning 14.5" 1:7 twist barrel with an a2 flash hider and 55 gr fmj rounds. So do not expect pi point accuracy when using the hashmarks if youre running a 16" 1:8 with a big muzzle break. That being said, they will work most of the time.

Durability:
I can personally say i have witnissed these optics be thrown, dropped, kicked, and exposed to temps between -5°F to 127°F for prolonged amounts of time without losing accuracy. It is common practice to give the elevation turret a couple love taps with a gerber after adjustments just to get it to accurately adjust. Otherwise it will fully adjust over the course of your next 3 round group. That in itself tells you how tight and well built these optics truly are.

In closing, they are expensive but well worth it if you want something that is dang near bulletproof. Target aquisition times, durability, and the companies record make it worth it. The slick style of the optic is just a bonus.