Will the 1889 bolt fit a model 1894? Maybe. It is the same bolt, with a one piece firing pin in the 1889, so you wont have the two piece safety feature, but that's only half the problem. The Marlin bolts were each individually fitted, so a bolt from another 1894 might not even fit well. It may be a little tight, or loose, or just right. No way to say for sure on each 1889, or 1894 bolt.