My buddy and I each got a Gen1 from SFRC. It was too good a deal to pass up.
After 4 shots my stock broke. Must have been a flaw or it was damaged in transit. So I put on the holding stock adapter to replace the broken part and went back to shooting. Tried trap loads,OO, slugs and some 3" goose loads and they all seemed to work ok.
I tried a couple of magazines for my MKA1919 and they seem to work ok as well.
I took the breacher brake off as it just adds length and weight and looks like it will snag on stuff. Looks evil though. I bought this primarily as a home/livestock defense from wildlife gun, so with the folding stock, no breacher it fits into a compact cabinet, and is actually shorter than my 14" pump action which is getting retired. Instead of having to load up one shell st a time for a pump,I can assess the threat and grab a magazine with appropriate ammo. (Bear-slugs. Yote-buckshot. Raccoon- BBs. Etc)
I might look for one of the pattern master chokes for a tight buckshot pattern, too.
Apart from the stock adapter hiccup, I'm pleased with this gun, especially for the price.
Buddy had no stock problem and his ran fine too. Just need to find some more mags.