I saw this on line advertised as a Mossberg 151. I knew was not a 151 as it is a bolt action. I asked him if barrel had been changed and he did not know. Went to look at it and it is an old Mossberg 42 M (b). It is a commercial model as there are no British acceptance marks. Well, made an offer and he accepted. Got it home and cleaned it. The barrel is very sharp and bright. There are a few minor spots of surface rust that will clean up easily and then polish the bolt. Has the three type front sight that flip up a "Ghost Type" circle, dot, and a flat bar. The rear is a Vernier sight. Has the Dust cover and adjustable trigger. Wood stock is about 85% and has the stock for a spare mag but is missing the cover door and spare mag. I am really getting a bug for these old 22 rifles.