The plug is just a stick inside the magazine tube that limits how far the spring will compress.
Remove the cap at the muzzle end of the magazine tube, but be very careful.
There is a big long spring under pressure in there and it's going to come flying out if you're not ready for it.
Best left to a gunsmith
Winchester did not make a model 96 shotgun,they did make a model 97 shotgun however.
Best left to a trained gunsmith.
your winchester model 1200 shotgun has a pump action.
Your winchester model 12 shotgun was made by winchester in 1947.
Your winchester model 12 shotgun was made by winchester in 1922.
your winchester model 12 pump shotgun was produced by winchester in 1942.
your Winchester model 12 shotgun was made by Winchester in 1959.
your Winchester model 1897 shotgun was made in 1916.
your Winchester model 1897 shotgun was made in 1910.
Your winchester model 1897 shotgun was made by winchester in 1927.That makes your shotgun 84 years old.
The Winchester model 1200 shotgun is a pump action shotgun.