This old Sears Ranger (by Savage Stevens) shotgun has a receiver Mark 5000 and I can find no information on receivers earlier than the 5001 Mark, within that numbering series.
In other words as far as I can tell there was never a model 4999, and the predecessor to this gun was called something else.
But with a 5001 diagram in hand which is relatively the same, and a brief education (thank you YouTube) I was able to completely strip the receiver and find the cause of my random misfire on the left chamber.
At some point the left firing pin Spring was replaced by this mismatched attempt at repair.
The firing pins seem a little hammered with the right one being slightly mushroomed on the hamer end.
This is all borne out by the fact that the right Barrel is the thinnest. The right barrel was used far more than the left on this gun.
This all came apart exactly like the 5001 model receiver except for the latch, which is screwed from the top on the 5000 but from the inside of the receiver on the 5001. Also the latch spring guide rod passes through a machined block which is screwed from the top of the tang, this screw being visible as soon as you move the latch sideways.
On the 5001, that guide rod passes through a cast-in boss on the underside of the tang.
In other words as far as I can tell there was never a model 4999, and the predecessor to this gun was called something else.
But with a 5001 diagram in hand which is relatively the same, and a brief education (thank you YouTube) I was able to completely strip the receiver and find the cause of my random misfire on the left chamber.
At some point the left firing pin Spring was replaced by this mismatched attempt at repair.
The firing pins seem a little hammered with the right one being slightly mushroomed on the hamer end.
This is all borne out by the fact that the right Barrel is the thinnest. The right barrel was used far more than the left on this gun.
This all came apart exactly like the 5001 model receiver except for the latch, which is screwed from the top on the 5000 but from the inside of the receiver on the 5001. Also the latch spring guide rod passes through a machined block which is screwed from the top of the tang, this screw being visible as soon as you move the latch sideways.
On the 5001, that guide rod passes through a cast-in boss on the underside of the tang.
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