Not without modifications
No, the Remington Model 1100 stock has a hole (recepticle) through the inside of the stock in the pistol grip area to accept the action spring tube. The Remington Model 870 stock has no need for this hole so the 870 stock will not fit on the Model 1100 action.
Not easily or readily.
700 ADL Long Action
No, a Marlin 881 stock cannot fit in a model 81. The stock would fit an 881, not an 81.
A model 7 stock would not fit a 600 Mohawk. The stock and the trigger guard do not line up correctly, although the stock may fit on the gun.
no
No
Boyds gun stocks and I believe the marlin mod 80 will be compatible, if not then a bit of wood working will be needed to fit the action.
This will not fit a model 12
No
I don't believe so.
No