Soilwork777, I looked at the link you showed. The kit I have doesn't look like that kit although the part number is the same. Mine came with a machine screw that screwed into the stock perfectly. And, it also came with a shank for the magazine cap plus retainer rings to go on the inside of the cap. And, of course it came with the swivels and a wood screw (which I didn't need).
On the outside of the package it says it fits most pump and auto shotguns plus Beretta 390. However, when I googled the part number (1231-2), I also came up with part number 12312, which shows only one swivel with the machine screw.
Maybe Uncle Mike's changed the contents a bit. Or maybe mine was not packed correctly and I got lucky.
Anyhow, the threads in the stock are standard threads--not metric.
