I have a G19 with the 106mm Barsto Barrel, and the 10rd mags I bought with it have the 2183 followers.
They feed FMJ rounds no problem, even the flat nose stuff, but if you load up some hollow point personal protection rounds it *always* jams on the last round in the mag.
Just a caution if you use hollow points, I don't think it matters if it is a Glock factory barrel or the Barsto. The problem is those followers.
Ahab.