Barrel is removed in a different procedure as well as the firing pin!
these have only been imported at best 8 months and only a total of 4000. also there is an extreme shortage of the M-57 mags.
Seems very likely that no more M-57 may ever be imported again, according to some dealers i have talked to.
So they are actually fairly rare!
I got 1 and it is my favorite out of 5 different Toks!