1). No, those lengths should be fine
2). Firing pin, cam pin, piston return spring, the screws that hold in the recoil rails strip really easy, but Templar makes/sells replacements
3). I’d say trigger, metal lower, safety, non-QD trunnion and barrel nut, are the best.

 

Thank you so much for your help! I’ll be going for a 12.5” barrel then. Thank you for the list of wear items; I think I’ve gotten them all with the exception of the recoil rail screws which I’ll pick up. As far as upgrades, what makes the non-QD trunnion a better option? One of the draws to the platform for me was the ability to quickly swap between barrels. Do problems arise with the QD system?

 

i personally like the non-qd because I have no desire to switch calibers on the same gun. If I wanted to have multiple calibers I would probably just buy another ACR to have dedicated calibers, but I understand that’s not always feasible. My first ACR had issues with the QD system where it would loosen no matter how much I would tighten it. It also would be pretty far off the zero when removing and reinstalling the barrel. The Non-QD trunnion definitely helps alleviate those issues while also lightening the rifle a bit with is a plus. But to be fair many people have the QD setup and it works fine for them, so it just depends on your rifle and your preferences.

 

For some reason I see the response in my email but can’t see it here; regardless, I didn’t realize that some people had issues with the QD system, thank you for sharing your experience! In that case I think I’ll shoot it a bit to see how I feel about the QD system and go from there. Thank you!