Marlin Model 200 12ga.

[MilitiaGuy]

I picked up a Marlin Model 200 12ga at a pawn shop in eastern WA state last month.
Don't know much about it but it is a hoot to shoot.

I noticed that H&R shotguns look almost exactly like this one, the Pardner series for instance.
I was wondering if slug barrels could be fitted to this shotgun and found the H&R site that does the fitting.
Unforch, the serial number does not start with the appropriate letter for the fitting.

Any info there?

Thanks,
Paul
aka MilitiaGuy