from the specs you list, it seems like an overall solid weapon. since you’re asking:
i’d consider getting the chamber reamed with a reliable 5.56 chamber reamer… it’ll ensure you’re not over-pressuring the weapon with an under-sized headspace, and it’ll open up the chamber itself and prevent stuck cases
from a sooper-reliability standpoint, and depending on what you do with your gun, the comments about the ARMS sight are all correct. some things you could do, and that i’d recommend- mill or tap the barrel to accept the block set-screws. one of the bigger problems with set-scewed sights is the risk of rotation. once you’ve given the screws something to grab, install the screws with red loctite and stake in place. loctite all by itself doesn’t help much at the gas block, as it turns to powder at 450ish degrees… and the gas block is likely to get hotter than that with rapid fire.
the Eotech may or may not give you problems… i can’t call this a “reliability” issue, because even if your 'tech goes down, you still have BUIS… the 'techs are kind of an anomaly in the gun world- they have a pretty proven track record of failures, yet people who demand only the best in firearms will still use them. not sure whats up with that.
and as mentioned, the RRA 2-stage triggers aren’t known for the best reliability, and for a carbine, they’re also generally inappropriate. depends on the weapons use, again, but for a fightin’ get-down-and-dirty gun, a 2-stage is a reliability issue as well as a safety issue- a good 6-7lbs single-stage is much less likely to ND you. if you chose to keep the RRA 2S, keep in mind they seem to only last about 5000 rounds before turning into a long, gritty single stage or failing altogether. yours may or may not, but that’s what i’ve seen.
OR-
just keep everything the way it is, dont worry about it, and have fun. its your gun, and only you know your specific situation, uses, and needs.
