A buddy had a 5 digit serial m12 20 25" solid rib full choke it wore out early too. Probably because he shot 2 3/4" shells in it, hard kicker to boot. Hmmm sure it being an early one with a 2.5" chamber that had anything to do with it.
" Cheapest velocity in the world comes from a long barrel and I sure do like them. MB "
