I have a 91/30 Mosin Nagant, and earlier today I was cleaning the bolt and when I reassembled it, everything went back together just fine. This evening after putting about 150 rounds down range I went to clean it again, except this time when I reassemble the bolt, the firing pin doesn't protrude out like it is supposed to do. I've tried adjusting the pin, which shouldn't have to be done seeings how everything lined up perfectly earlier. No matter how much I adjust it, the pin never comes out, tried dry firing to see if it would come out, i've tried disassembling and reassembling over and over, I'm lost with this issue.
Mosin Nagant firing pin issues
- Thread starter Reaper2/5
- Start date
- Status
Steel Horse Rider
Member
Did you examine the end of it closely to see if it is broken? I cannot imagine a way to reassemble the bolt in a manner that it would fit back into the gun and not fire a cartridge.
16in50calNavalRifle
Member
- Joined
- Mar 7, 2009
- Messages
- 355
Agree with Steel Horse, but Reaper, did you reassemble the bolt and turn the cocking piece until it was flush with the rear end of the firing pin, with the slot in the pin lined up (more or less) with the little hash marks on the cocking piece?
This requires you to hold the whole bolt assembly down with some force on the front end of the firing pin (I usually stick it down on a piece of scrap lumber) and twist the cocking piece.
You can also adjust the firing pin using the rectangular cut on the side of the "tear-drop tool" you should have with your Mosin. Once the firing pin is screwed into the cocking piece enough to hold it, you can twist it further in using the tool as a wrench. This is a lot easier than holding the sucker down on the front of the firing pin (yes, Mosin bolt springs are consistent with the overall 19th century heavy industrial delicacy of the rest of the rifle - ridiculously strong).
All of this is very hard to describe or understand with words. Seek out a YouTube video (I think there are many) showing in detail how to disassemble, assemble, and adjust a Mosin bolt and firing pin.
This requires you to hold the whole bolt assembly down with some force on the front end of the firing pin (I usually stick it down on a piece of scrap lumber) and twist the cocking piece.
You can also adjust the firing pin using the rectangular cut on the side of the "tear-drop tool" you should have with your Mosin. Once the firing pin is screwed into the cocking piece enough to hold it, you can twist it further in using the tool as a wrench. This is a lot easier than holding the sucker down on the front of the firing pin (yes, Mosin bolt springs are consistent with the overall 19th century heavy industrial delicacy of the rest of the rifle - ridiculously strong).
All of this is very hard to describe or understand with words. Seek out a YouTube video (I think there are many) showing in detail how to disassemble, assemble, and adjust a Mosin bolt and firing pin.
Last edited:
Al Thompson
Moderator Emeritus
Welcome to THR Reaper! 
We'll see if this does better in Gunsmithing.
We'll see if this does better in Gunsmithing.
carbine85
Member
Check out this https://images.search.yahoo.com/yhs...g+pin+protrusion&hspart=mozilla&hsimp=yhs-001
Youtube is flooded with videos covering this.
Youtube is flooded with videos covering this.
Steel Horse Rider
Member
I didn't think about the pin being in the safe position but that would definitely stop it from firing. Pull back and twist left.
herrwalther
Member
- Joined
- May 1, 2013
- Messages
- 8,136
Steel Horse Rider said:
The firing pin has a very small margin of error in a Mosin. Which is why they came with a go/no go gauge, impressive even by today's standards. Also look at the back of the bolt, the notch at the back of the firing pin should be pretty close to the notches on back of the bolt. You can use a tool to turn the firing pin and move it forward.
caribou
Member
When you adjust the firing pins length, use the issued bolt tool/screwdriver.
Use the tool like a wrench, on the flats of the firing pin with the bolt head removed. Do not use the screw driver tip to adjust the firing pin from the slot in the rear. This is one of the accessories in the little pouch that has a muzzle protector, a jag tip for the cleaning rod, a rod handle and rod handle piece.
As you mentioned, the slot in the rear of the pin should have 'witness marks' it lines up with marked on the cocking piece, where it sits flush with the back of the cocking piece. Start from there and use the tool to measure the pins protrusion with the bolt head on and the bolt. Adjust the pin in or out/up down untill it fits within specifications cut into the tool.
Use the tool like a wrench, on the flats of the firing pin with the bolt head removed. Do not use the screw driver tip to adjust the firing pin from the slot in the rear. This is one of the accessories in the little pouch that has a muzzle protector, a jag tip for the cleaning rod, a rod handle and rod handle piece.
As you mentioned, the slot in the rear of the pin should have 'witness marks' it lines up with marked on the cocking piece, where it sits flush with the back of the cocking piece. Start from there and use the tool to measure the pins protrusion with the bolt head on and the bolt. Adjust the pin in or out/up down untill it fits within specifications cut into the tool.
maxscrambler
Member
- Joined
- Feb 27, 2015
- Messages
- 1
Am I the only one who uses the connector bar as a firing pin screw in tool?
- Status
