i wasn't sure, i was just yackin about shortening a mossberg barrel and figured i'd ask about the 58, the barrel on that thing looks like its 40" long! well.. its 28. i'd like to take it down to 22 ish.. at least. i suppose its all 'tuned' to work with the entire range of 2 3/4 shells.. from back then, correct? so i could probably trim 6" off, then enlarge the ports the next size.. and then the mag tube cap ajustment should be completely functional still... i was going to leave it alone so i wouldn't wreck it, but it might be kinda fun to play with it. not worth a whole lot anyway.