Guys - I just got off the phone with GM Barrels. Asked the nice lady what kind of specials they were running on ML barrels. They are:
21" - 15/16" 50 cal flint 1:28
28" - 15/16" 45 cal perc 1:28
28" - 1" 45 cal perc. 1:28 (ordered one)
28" - 1" 50 cal flint 1:28

All above are $95 + shipping.