Marlin Ace in the Hole Sight for the 1894 Model
A clever idea from Williams Gunsights sees a picatinny rail for use with optical sight but which also incorporates a small adjustable rear sight and a Firesight fibreoptic front sight. So, in the event of a failure with your optical sight you can whip it off and still have some back up iron sights to use! Please be aware that this system only fits Marlin rifle with the front sight is dovetailed to a lower base …. it will not fit the Cowboy models for example or others where the front sight fits directly into a dovetail cut into the barrel itself eg. some older Model 1894 rifles.