Thanks for all the info guys!
I owned two replicas back in the day. One failed on me within a week, my other one still works, but has a sh**** reticle (choppy at best.) The only thing that really bugged me about the replicas were the reflective like glass on the back, making them unusable outside on sunny days. I've never seen those sacrificial lenses before, will probably pick a few up a few up for my beater 553, since L3 doesn't really have the best customer service for they're US customers, let alone Canada, and a broken piece of glass would be a hassle to say the least.
Think I'm going gun shopping next week at either warcraft games, or Richmond airsoft. Any good new brands I should look for (outside systema lol), and brands I should stay away from?