For a number of years my Squirrel rifle was a Mossberg 42MC if memory serves me correctly. This was a bolt action with 7 shot detachable magazine (clip). The original sights were an abomination but I fitted it with a Bushnell 3x7 variable scope made for .22's. This was a rather inexpensive scope for grooved receivers on .22's. This rifle didn't have grooves so I machined an aluminum block with the grooves to attach to the top of the receiver. After a bit of use I just left the scope set on 5x & never changed it thereafter. In spite of being a relatively Cheap rifle it was a Tack Driver. It accounted for a pile of them Bushy Tails over the years I shot it.
The first shotgun I owned was a J Stevens Arms & Tool Co 12 ga double. It was one of their low end models, a 325 if memory serves me correctly, wish I still had it but traded it off many years ago.