Get the ciener kit, on some weapons it takes a little tweaking to get it to run right. there are tips about it on the pistol calibers board. I have a dedicated upper w/ 1:16 twist (standard 22lr twist) that is very accurate & very quiet suppressed. & it runs in full auto very well, both with Rem Golden Bullets, and Win Dynapoint ammo. in a standard 1/7 or 1/9 bbl, you may or may not notice the accuracy diff. depends on your level of expertise. and the 30rd mags can be adjusted for reliable, I have 4 that run. only qualifier is I only load 27 rds, occaisionally I would get a FTF w/30 rds. but I can unload 27 rds real fast on the "Fun " setting!! down the road, or if you have the money now, get a Kuehl 22lr upper, it uses the ciener kit, and is a nice setup. Or get an old beater 22lr upper, and have a local gunsmith put a 22lr reline tube in it. Mike Klos, at www.american-manufacture.com does this, and the accuracy is much better than a 223 bore.
enjoy shooting!!