My trigger pivot pin partially worked it's way out. Is there anything other than the stock that is supposed to stop it from coming out? I'm contemplating filling in some of the excess clearance in the trigger group pocket of the stock with some devcon to stop the pin from having room to back out again. Suggestions?
M305 trigger pin
- Thread starter charles u farley
- Start date
I want to see a picture of this. Confirm whether you are talking about the hammer pin or trigger pin.
If the trigger pin has walked out, you've probably ran into a serious trigger issue, which means a seriously potential safety issue.
Was the trigger pin properly seated to begin with(ie fat head flush or slight recess from right side housing? Without all other parts, how snug is the trigger pin to the housing? Is there wobble/wear? Would loctite firm it up?
Potentially you could get SEI oversize pins and manually fit them as replacement.
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You should also check the fit/friction of the trigger and the pin itself. Is there any drag that may lead to torque movement of the pin? This should be lightly lubed.
If the trigger pin has walked out, you've probably ran into a serious trigger issue, which means a seriously potential safety issue.
Was the trigger pin properly seated to begin with(ie fat head flush or slight recess from right side housing? Without all other parts, how snug is the trigger pin to the housing? Is there wobble/wear? Would loctite firm it up?
Potentially you could get SEI oversize pins and manually fit them as replacement.
---
You should also check the fit/friction of the trigger and the pin itself. Is there any drag that may lead to torque movement of the pin? This should be lightly lubed.
A bit of background. This happened when I was dumping two full loads through 5 magazines, to check their function for the epic M14Doc/Hungry clinic coming up. Not shooting too quickly but taking aimed offhand shots at the 100m gong. I got maybe 40 shots off. This rifle has about 150 shots through it total. I have pulled the trigger group out several times after previous range trips to muck with fitting a sling swivel post, lube, checkout the spring guide for upgrades, etc. I have never noticed the pin being unseated before.
Definitely trigger pivot pin. I have replicated the situation and will post pictures tomorrow. I left my camera at work.
The pin walked out far enough that the small end was no longer in the left side of the housing. The trigger was locked up due to the hammer spring housing pushing the entire trigger back and keeping it's hooks engaged on the hammer. The trigger can't move at all due to being fully back in it's slot in the bottom of the housing. With it jammed up like this i can actually remove the pin and all the parts stay in place.
Definitely trigger pivot pin. I have replicated the situation and will post pictures tomorrow. I left my camera at work.
The pin walked out far enough that the small end was no longer in the left side of the housing. The trigger was locked up due to the hammer spring housing pushing the entire trigger back and keeping it's hooks engaged on the hammer. The trigger can't move at all due to being fully back in it's slot in the bottom of the housing. With it jammed up like this i can actually remove the pin and all the parts stay in place.
Pictures are up. Image quality of trigger in the stock are not so good since it is a difficult place to light and focus on the correct bits.
The rib below the trigger pin is just a bit too low to stop the pin from backing out. My plan is to build up that area with some steel filled epoxy so it can't back out that far again.
The rib below the trigger pin is just a bit too low to stop the pin from backing out. My plan is to build up that area with some steel filled epoxy so it can't back out that far again.
Oh Ho!
Somthing more than meet's the eye's is going on there. I would get ahold of the company that sold you that rifle and ask if I could get a new trigger group. As one thing I would never want is that pin to come out while I was using the rifle.
Somthing more than meet's the eye's is going on there. I would get ahold of the company that sold you that rifle and ask if I could get a new trigger group. As one thing I would never want is that pin to come out while I was using the rifle.
Im curious because this happened with the first 305 I had earlier this year . A 2011 model and it had a seriously bad bolt AND this. I had a hell of a time taking the gun apart and what I saw was what you have, I never fired the gun and the dealer was good enough to take the gun back and scrap it. When I looked inside the stock there was a score mark where the pin had been contacting the stock. I guess there is no substitute for due diligence eh Glad you spotted it before SHTF..Hope your dealer helps you out.
Cant help with a fix tho, but I would be lookin at Duct Tape
Cant help with a fix tho, but I would be lookin at Duct Tape
Im curious because this happened with the first 305 I had earlier this year . A 2011 model and it had a seriously bad bolt AND this. I had a hell of a time taking the gun apart and what I saw was what you have, I never fired the gun and the dealer was good enough to take the gun back and scrap it. When I looked inside the stock there was a score mark where the pin had been contacting the stock. I guess there is no substitute for due diligence eh Glad you spotted it before SHTF..Hope your dealer helps you out.
Cant help with a fix tho, but I would be lookin at Duct Tape
My Google-fu turned up a few forum posts on this topic. I had an idea that the pin is not held in by anything other than the stock. That was echoed by some of the posts I found. It seems aftermarket stocks have the problem most often. The Norinco stocks have a few ribs in the area but nothing close enough to holding the pin in. One person reported two different triggers did it in the same stock. The particular harmonics of the recoil and cycling action may make some rifles' pins walk out and others not, all else being equal. I have glued in a filler on the right side of the trigger group pocket so mine has no space to back out now.
Pictures of the reworked stock tomorrow, too late now.
Oh, I also figured out how to cure my oprod/bolt stiffness that would stop the spring from having enough oomph to pull the action closed through the halfway point if you rode the handle instead of dropping if from full open. A few layers of paper between the back of the trigger group and the stock was all it took. The semi-retarded beaver that gnawed out the trigger pocket went a little too deep. The trigger group was angling slightly upward at the rear and pinching the bolt between the hammer and the underside of the receiver. A permanent shim will be glued in after I safety check it and run some rounds through to test.
Seems the stock was the cause of both my main issues, and easily fixed once I sat down and examined how the parts interacted outside of the stock.
Pictures finally up of my hopefully permanent fix.
Strip of 16 ga. sheet metal about 1/4"x 1.5", bent in half. It's wide enough and high enough that the bent section rests right beside where the trigger pin is when the trigger group is assembled with the stock.
The stock rib I'm going to glue it to roughed up to key in the glue better.
The finished lump of glue. This extra piece is now in the perfect position to keep the trigger pin from backing out on me again.
Strip of 16 ga. sheet metal about 1/4"x 1.5", bent in half. It's wide enough and high enough that the bent section rests right beside where the trigger pin is when the trigger group is assembled with the stock.
The stock rib I'm going to glue it to roughed up to key in the glue better.
The finished lump of glue. This extra piece is now in the perfect position to keep the trigger pin from backing out on me again.
