I understand the basic difference between blow-back and gas operated. My 9mm (foxtrotmike) has blown up two optics. The heavy bolt and stout buffer spring make for quite a jarring return to battery. I assume this is what the cheap optics are dying over. I had an old (really cheap) tru-glow red dot that died after only a few shots. Replaced it with inexpensive ADE reflex that I thought would handle the task. Nope, 20 shots and dead.
Trying to not break the bank but need something that won't be killed from the 9mm pistol. Thoughts? Are my assumptions close? Ideas for optic? Here's the second optic I tried,