Interested in eventually submitting this as an sbr, June 9 or whenever. PWS pistol in 223/556 Since the Mod2 is NOT coming until at least mid July, I will settle on the Mod1. I can buy a factory built for $1750. I can find complete uppers for $1100. I have never built a lower, but that does not intimidate me. I was informed that the PWS lower is a standard lower, so I could build one and get better parts to put in a better lower. Everything I calculate puts me at the same or more in cost to buying the complete factory pistol. How important is having a factory assembled AR vs building one? What possible issues might I run into that would make the build not worth doing? Any suggestions on "better" parts for the lower? I am thinking Geissele trigger, but other parts seem to be personal preference as to which is better. Any thought, opinions, build help accepted.