I have an 1889 Marlin manufactured in 1892 and a question or two. Is there a spring in the bolt to make the firing pin retract or when you close the lever is it reset ? The rifle has been inconsistent in firing, when I hold the rifle barrel up I can see the firing pin slide back out of the bolt. If you point the barrel down the firing pin will slide forward. Anyone care to enlighten me on what to look for???