
Obviously I thought so because I have Bar-Sto Precision barrels in both of my Glocks. Do you really need an aftermarket barrel? Not in a 9mm chambering you don't. I've got extended barrels with muzzle-ports on my Glocks; but, my 45 barrels will, also, handle either ACP or Super cartridges; AND, I tend to shoot very fast; so, muzzle-ported barrels are an advantage to me.
All of Glock's factory standard 3rd generation barrels are of sufficient high quality to be able to safely handle whatever commercial ammunition you feed them. Needlessly worrying about a kaBoom! event in a 9mm Glock is a complete waste of time! Don't ever shoot reloads; and, you'll be fine.
To briefly address your other concerns: In my opinion, Wolff Gunsprings makes the best solid steel guide rod(s) for a Glock. I absolutely love and swear by mine. A solid steel rod fitted with a high quality Wolff spring really smooths out the pistol and improves feeding.
I, also, like to use a 4.5# connector in my Glocks. Again, in my opinion, Lone Wolf Distributors makes the best 4.5# connector on the market for any Glock. Do you need anything else? Maybe a nice 25 cent polish job which you can do at home with some Flitz Polish and a few Q-Tips; or, you could go completely nutz and install a nice set of Truglo, 'TFO' sights.
