Please include a serial number along with a model number to get the answer you are looking for.
It depends on the browning model of shotgun you are asking about,and the condition it is in.
What model?
I would like to start first with the serial number.The letters MR in the middle of the serial number indicates that your browning shotgun was made in 2007.With that said,if you have a pump shotgun then you have a browning BPS.If you have a over/under shotgun then you have a browning citori.If you have a semi-auto shotgun then you have a browning gold model.
No such model number.
This Shotgun was made by Stevens their model. 520. Made from 1930's to 1950'S Although the shotgun was Browning patent marked, it was not made by Browning.
If your over under shotgun was made prior to 1964,then the model of your Browning shotgun should be named the superposed.
There is no such thing as a Browning semiautomatic M70 rifle. The Model 70 bolt-action rifle was produced by Winchester, while Browning produced a very different semiautomatic rifle called the BAR. Which is it?
Browning never made a Model 51 shotgun.
You will have to call Browning and ask
You must call Browning to find out.
Made in 1969. Model depends on the features.