The Stevens comes in both short and long actions depending on the caliber.
For the most part, parts from Savage bolt action centerfire rifles manufactured after 2001 (except the accutrigger trigger) will interchange with the Stevens 200. The only other exceptions being the magnum caliber barrels, barrel nuts, bolt and bolt heads and the model 40. In addition, the new detachable magazine model M-14/114 American Classic use different action screw spacings so the stocks will not interchange. Their are other, isolated exceptions on earlier vintage Savage bolt actions manufactured prior to 2001 - check barrel shank diameter, bolt length, bolt head and firing pin diameter to be sure they will fit the current production Stevens 200.
Savage models 10,12,11,14 and 16 are short actions.
Savage models 110,111,112,114 and 116 are long actions.