I appreciate all the insight fellas! I definitely didn't know the ups stores do the e prints. As to the regards about compliance I fully plan on a pin and weld the muzzle device, as well as pinning my stock, I really don't see myself having the need to swap muzzle devices or see myself needing the collapsing feature of most stocks. Also, most pin jobs I've seen on traditional collapsing style ar stocks are easily reversible in a short fashion (at least the ones I've seen) and tbh I just don't want the trouble at the range (don't have many places to shoot outside of my local range, if anyone wants to volunteer some land near my dwelling on the south shore though I'm more than happy to oblige lol!) when someone like an RSO finds themselves a bit curious and decides to come investigate the younger guy at the range (I'm new there and definitely one of the younger members there compared to the gen pop of members) with the gun that looks like it doesn't meet compliance. I know, it's not something I should have to deal with in a perfect world, but I find myself straddling the line to find what works best for me, but also buys me legal pliability to be able to justify my ownership of such items when it comes time that I want to actually use the firearm. The insight is always appreciated! Y'all are the best!