Back in 1969 I went hunting with a friend and he loaned me a Marlin pump 12 gage shotgun that looked like an exacting copy of a Remington 870. It had a light weight reciever that appeared to be aluminum or alloy so was a lighter weight than an 870. It was a very well designed ergonomically and was very easy to hit dove on the wing with. What I do not know is the model number of this mystrey shotgun. Can anyone help with information?