A mexican95' s, and 98' s are mausers, an 03 springfield is not a mauser. The only thing that the springfield has in common with a mauser is a claw extractor, and clip loadable double stack magazine.

Mexican mauser 98' s and G33/40' s are model 98' s with small receiver rings. Though G33/40' s are alot harder to find than most other mausers and will cost you a bundle as well.

Turk 38' s are considered a model 98- they most have a large diameter receiver ring, but are threaded for a small ring barrel.