This Winchester manufactured bolt with buffer is for the model 1911 self loading shotgun and is in very good condition with some light wear and some rust staining. The buffer is original equipment which is likely hardened and not very useable.  (file photo)

Note: Winchester model 1911 self loading shotguns with the following serial numbers have been observed with this part: A3849, A16342, A30460, A45726, A58132, A73696, A75734, A75753 and A76060