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This prevents the action sleeve "from being retracted by the hand of the gunner until after firing, and hence rendering the firearm more safe". The slide lock "stands in such a relation to the body of the firing pin as will prevent the firing pin reaching the primer until the pin has moved forward a sufficient distance to insure locking of the breech bolt". This improved slide lock kept the shotgun locked until actual firing occurred which prevented it from jamming in the case of a misfire. Of these improvements, the slide lock is the one that made the Model 1897 into a safe firearm. The stock was made longer and with less drop.A movable cartridge guide was placed on the right side of the carrier block to prevent the escape of the shell when the shotgun was turned sideways in the act of loading.
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In the absence of any recoil, the slide handle had to be pushed forward manually in order to release the action slide lock. In firing, the recoil of the shotgun gave a slight forward motion to the slide handle and released the action slide lock which enabled immediate opening of the action.
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