Surplus 5.45 is still cheap as hell. Really considered building an upper for it.
I'll most likely end up with either a .22 conversion or a dedicated upper.
Really been itching for another 9mm Ar, never should have sold the one I had.
In my mind...for cheap trigger time there is no substitution for .22LR. I looked, and looked, and LOOKED for .22 AR conversions but found countless problems with most of them.
Bolt conversions = problems with many magazines, wrong twist in .223/5.56 barrel for a .22LR, seriously gummed up gas tubing and upper receiver = tons 'o cleaning.
Dedicated uppers = expensive, finicky without the right magazine.
I was dead set on going with the Tactical Solutions model as I've read time and time again that they are considered the gold standard but then there was an issue...you have to seriously adjust your lower to work with it thus making the .22LR to .223 back and forth nearly impossible. If you want to build a dedicated lower for it, I guess the Tac Sol + Black Dog conversion is amazing...then again that will run you a minimum of $800+ and that's with a CHEAP lower/lower components...you could easily drop $1200 for a complete rifle if you get a quality lower, trigger and butt stock. To me that's insane...
This is what led me to the S&W. The standard version is going for $420 here, the MOE version is $520. That $$ gets you a warranty and a complete gun that mimics an AR in every way, you can even put stock AR triggers in it. Compared to a Colt AR or any of the GS line, the S&W is beyond simple to disassemble. So far I feel I've 100% made the right choice...only time will tell though.
I paid less for that complete S&W that I would have for a Tac Sol upper alone (an upper that is sans rear sights BTW)...looking at what I spent (the rifle, front grip, red dot and even a possible trigger change)...all of that totaled is $715...not too shabby for a cheap AR training tool.
As for a 9mm upper...I would 100% buy one...if Illinois allowed SBRs, which they don't.