You have me puzzled.
It is definitely a M55 action.
The magazines are single stack.
I have a 5 round and a 10 round magazine.
The magazines hold the 6.5x55 cartridge no problems all though like I said before the rounds can not be any more than 2.940 otherwise they jam in the magazine.
I think its fitted with a new stock its very nice.
The barrel is a 24" Shillen stainless heavy varmit.
I will have more time to check it out over the weekend and I will take some pictures. Its a very nice rifle. It might be a load of crap when I try to shoot it but we will see.
The magazines are the same as the ones posted in these pictures.
http://i286.photobucket.com/albums/ll10 ... 90ab53.jpg