slam fires

A

Apple tree

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First of all I can't say it's not at lest a little bit fun having instantaneous double taps come out of that rifle.

I am having slam fires on the bench, with aguila as well as with xm80c lake city 7.62 with my new M305. The firing pin is dry and moves freely.

Is this common?

How do I cure this?
 
We need more info. When is it doing it? Are you single loading the rifle, or loading from the mag.

Is it doubling, or just slam firing?

Have you checked for hammer follow?
 
Claven2 said:
We need more info. When is it doing it? Are you single loading the rifle, or loading from the mag.

Is it doubling, or just slam firing?

Have you checked for hammer follow?
Click to expand...

Feeding from AIA mags, its sending two at a time about once every 1-2 mags. There is no problem when arming the rifle.

Ill try using the original 5rnd mag more and see if it still does it, it would be a shame if the mags were responsible though, the AIA really are just the right size for the rifle.
 
Apple tree said:
Feeding from AIA mags, its sending two at a time about once every 1-2 mags. There is no problem when arming the rifle.

Ill try using the original 5rnd mag more and see if it still does it, it would be a shame if the mags were responsible though, the AIA really are just the right size for the rifle.
Click to expand...

So just to be clear, it's not firing when you chamber a round, it's doubling when you pull the trigger on the bench? If so, that's likely not following through with the trigger pull. You have to make sure you pull the trigger decisively to the rear, if you squeeze it just to the breaking point like a target rifle the recoil will cause it to bump fire.

Assuming it's not hammer follow, have you tested for that?
 
Has it always done this or did it just start after you changed something like the stock or ammo or...?
Have you fully stripped and cleaned it since this started happening? Does the firing pin float freely or is it gummed up?
Have you tested it for the hammer following the bolt home if you hold the trigger while cycling it empty?
Going to need more information to be of much help but I would not shoot the rifle again until you figure out why it's doing it. If it doubles once in a while it could very easily dump the whole magazine one of these times instead of the fun double.
Your rifle is not safe to shoot until you figure this out. If you don't know much about the rifle I suggest you take it too a gunsmith who is familiar with the M14. Depending what's causing it you could get an out of battery ignition which could destroy your rifle and potentially your face so take this seriously, full auto is fun if the rifle is doing it correctly but if it's a sticky firing pin it could be very dangerous.
 
Are you familiar with and have you tried the trigger after assembly test on it ? Its VERY important not to get slam fires as others have mentioned .

1. #### the action and put the safety on then ensure it wont fire.
2.Take the safety off and fire the action but keep trigger to the rear and you can see the hammer go forward . Keeping the trigger to the rear #### the action and let the bolt go forward while watching if the hammer follows the bolt forward .The hammer should still be to the rear at this point...try this a few time s to make sure the hammer doesn't follow bolt forward .
3. Release the trigger and you should hear a click and then fire the action again.
 
chalkriver2 said:
Are you familiar with and have you tried the trigger after assembly test on it ? Its VERY important not to get slam fires as others have mentioned .

1. #### the action and put the safety on then ensure it wont fire.
2.Take the safety off and fire the action but keep trigger to the rear and you can see the hammer go forward . Keeping the trigger to the rear #### the action and let the bolt go forward while watching if the hammer follows the bolt forward .The hammer should still be to the rear at this point...try this a few time s to make sure the hammer doesn't follow bolt forward .
3. Release the trigger and you should hear a click and then fire the action again.
Click to expand...

I just tried this, the hammer does not follow the bolt, it resets normally like a c7 or my 1022
 
Pop said:
So just to be clear, it's not firing when you chamber a round, it's doubling when you pull the trigger on the bench? If so, that's likely not following through with the trigger pull. You have to make sure you pull the trigger decisively to the rear, if you squeeze it just to the breaking point like a target rifle the recoil will cause it to bump fire.

Assuming it's not hammer follow, have you tested for that?
Click to expand...

''if you squeeze it just to the breaking point like a target rifle''

That is exactly what I am doing, how else am I gonna shoot it accurately? I suspected it might be ''bump firing'' more than slam firing.

Still, as much as I like semi-auto fast firing, I want a rifle I can take careful accurate shots with. Is there a way to reduce the likelyhood of that or will I have to develop some kind of alternative way of pulling the trigger? I won't be hunting with a rifle I can't take careful shots with...to me the ability to use my 20 years of target practice is at least as important as a rifle's accuracy...
 
cr5 said:
Has it always done this or did it just start after you changed something like the stock or ammo or...?
Have you fully stripped and cleaned it since this started happening? Does the firing pin float freely or is it gummed up?
Have you tested it for the hammer following the bolt home if you hold the trigger while cycling it empty?
Going to need more information to be of much help but I would not shoot the rifle again until you figure out why it's doing it. If it doubles once in a while it could very easily dump the whole magazine one of these times instead of the fun double.
Your rifle is not safe to shoot until you figure this out. If you don't know much about the rifle I suggest you take it too a gunsmith who is familiar with the M14. Depending what's causing it you could get an out of battery ignition which could destroy your rifle and potentially your face so take this seriously, full auto is fun if the rifle is doing it correctly but if it's a sticky firing pin it could be very dangerous.
Click to expand...

If i lock the action open and tilt the rifle back and forth about 30 degrees, the firing pin moves in and out. I don't think it is sticking, unless something I don't understand happens when I fire it. The bolt was completely disassembled and cleaned when I received the rifle about a month ago (tried to reassemble it for about an hour and a half, gave up, went back at it the morning after with a cut in half 308 case and finally got it....I don't think I will be disassembling it again anytime soon)
 
Apple tree said:
Feeding from AIA mags, its sending two at a time about once every 1-2 mags. There is no problem when arming the rifle.

Ill try using the original 5rnd mag more and see if it still does it, it would be a shame if the mags were responsible though, the AIA really are just the right size for the rifle.
Click to expand...

Youtube is full of guys haing issues with E-lander and AIA mags. Definitely try M14 mags as part of your diagnosis.
 
Pop said:
So just to be clear, it's not firing when you chamber a round, it's doubling when you pull the trigger on the bench? If so, that's likely not following through with the trigger pull. You have to make sure you pull the trigger decisively to the rear, if you squeeze it just to the breaking point like a target rifle the recoil will cause it to bump fire.

Assuming it's not hammer follow, have you tested for that?
Click to expand...

This is good advice. If you are used to bolt action hair triggers like some of the Savage products, you may not be shooting the M14 properly. Yes, you want smooth, slow, even pull to shoot well, but once the rifle fires, you have to keep squeezing the trigger all the way to the rear. Too light a touch off the bench WILL give you a bump fire - usually only a 2 round burst. It's not a malfunction if that is what is occuring - it's a shooting technique issue, technically you pull the trigger twice.
 
Claven2 said:
This is good advice. If you are used to bolt action hair triggers like some of the Savage products, you may not be shooting the M14 properly. Yes, you want smooth, slow, even pull to shoot well, but once the rifle fires, you have to keep squeezing the trigger all the way to the rear. Too light a touch off the bench WILL give you a bump fire - usually only a 2 round burst. It's not a malfunction if that is what is occuring - it's a shooting technique issue, technically you pull the trigger twice.
Click to expand...

I will pay attention to this

The AIA mags seem to be feeding and clipping in place well. Who carries m14 mags?
 
Apple tree said:
If i lock the action open and tilt the rifle back and forth about 30 degrees, the firing pin moves in and out. I don't think it is sticking, unless something I don't understand happens when I fire it. The bolt was completely disassembled and cleaned when I received the rifle about a month ago (tried to reassemble it for about an hour and a half, gave up, went back at it the morning after with a cut in half 308 case and finally got it....I don't think I will be disassembling it again anytime soon)
Click to expand...

This was my first thought when I read slam fire. Sounds like your firing pin spring may be broken or missing.
 
45 aguila rounds through the factory 5rd mag today, no bump or slamfires.

I don't know if its the mag or trigger control, probably trigger. Time will tell.
 
Apple tree said:
If i lock the action open and tilt the rifle back and forth about 30 degrees, the firing pin moves in and out. I don't think it is sticking, unless something I don't understand happens when I fire it. The bolt was completely disassembled and cleaned when I received the rifle about a month ago (tried to reassemble it for about an hour and a half, gave up, went back at it the morning after with a cut in half 308 case and finally got it....I don't think I will be disassembling it again anytime soon)
Click to expand...

Sounds like it's not a rifle problem, more like you're inadvertently bump firing it then. If it passes the trigger reset test and the firing pin is moving freely just practice continuing to squeeze the trigger when shooting. I fully understand wanting to shoot as accurately as possible but these are not target rifles so being a little more forceful on the trigger won't make enough difference in accuracy to really worry about. Not saying you have to mash it like it's a double action only pistol or anything like that just practice following through on the squeeze. Maybe some gong banging instead of target shooting will train your finger a little better for these rifles.

Good luck.
 
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