Double fire or accidental Bump fire?

G

Gobc

CGN frequent flyer
Rating - 100%
66   0   0
Location
Maple Skids, BC
So I was at the range doing some "precision" shooting with my LRB M25 and after about 40 rounds through, I had a double fire. First thing I did was check the sticky's when I got home, and my rifle passed the "test after assembly" by Morpheus32.

One thing I've noticed about the M14's 2 stage trigger is that after the trigger has been pulled, it doesn't need to be fully released to reset, it only needs to reset to where the sear/hammer engagement is at the 2ed stage. I've confirmed this with another trigger group on my M1A, both which are USGI. Can any of the great M14 guru's also confirm this?

If this is indeed the case, is it plausible that I could have bumped the gun? Has this happened to anyone else, and I don't mean due to a trigger malfunction, but trying to be so gentle on the trigger and grip, that you inadvertantly bump fired the gun in your hand. I do recall having a light grip when this happened.

Is there any other trigger tests I can do?

Thanks guys
 
Gobc said:
So I was at the range doing some "precision" shooting with my LRB M25 and after about 40 rounds through, I had a double fire. First thing I did was check the sticky's when I got home, and my rifle passed the "test after assembly" by Morpheus32.

One thing I've noticed about the M14's 2 stage trigger is that after the trigger has been pulled, it doesn't need to be fully released to reset, it only needs to reset to where the sear/hammer engagement is at the 2ed stage. I've confirmed this with another trigger group on my M1A, both which are USGI. Can any of the great M14 guru's also confirm this?

If this is indeed the case, is it plausible that I could have bumped the gun? Has this happened to anyone else, and I don't mean due to a trigger malfunction, but trying to be so gentle on the trigger and grip, that you inadvertantly bump fired the gun in your hand. I do recall having a light grip when this happened.

Is there any other trigger tests I can do?

Thanks guys
Click to expand...

Yes to your theory. From start to finish.
The trigger resets as soon as it hands off from the rear hammer hooks. However, it is not at rest or full reset untill the trigger travels forward till it stops.
A loose hold with finger pressure could cause a "bump" fire.
Which it sounds like you probably had.
Do the morpheus trigger test 10 times in a row.
Remove stock, reassemble and do it 10 more times.
If you ha ONE failure in all that, a deeper investigation would be needed. No failures in that procedure and I'd feel comfortable saying you had a bump fire and need to stop holding her like she's a prom queen hehehe joking ;)
 
Thanks doc. Considering I was being really touchy with the trigger, I hopefully did bump it. I did the morpheus test several times, but I'll do it many more times.
 
So I took my rifle to the range to day, and it bumped on me. So I went back home, grabbed my SA M1A which I know if rock solid functional, and swapped out the triggers. In one mag with the suspect trigger, it fired a 2 shot burst, and then a 3. I was dam sure to press and hold the trigger down. So yeah, dissapointed to say that I have a messed up trigger guard. I've had 3 M14 type rifles, and two of them have had trigger problems, one of them being USGI.

Regardless, anyone have any advice on who to send it in for service? I'm also thinking I'll need to replace the sear and hammer.
 
You shouldn't need to send it in for service. It's quite likely that the trigger group just isn't set into the rifle far enough. Check the stickies on how to fix it, but if the trigger group isn't in far enough then you get a situation where the bolt won't reset the hammer all the way.

Because it didn't work right in anther rifle means very little - your other rifle could be keeping the trigger out even further than the first.

Check the stickies but the gist is look at the back if where the trigger seats in the stock and the area under the two little wings of the trigger. One or both might need to come down. I'll leave it to one of the experts or the stickies to tell you what to look for because I don't want to give bad advice
 
Your post got me thinking so I did some reading but didn't find what I was looking for. I decided to test each trigger group and noticed a different feel. Well, a picture is worth 1000 words, so here are 2000 showing the state of each trigger having been cocked, then fired with the trigger still held down:

Defective Trigger:



Functional Trigger:



Spot the problem? Look at the engagement of the disconnect and hammer

No doubt in my mind that this is a trigger problem.
 
Woah.... Are you saying you pulled the trigger then, while still holding it, you cocked the hammer back, and kept holding the trigger?

Wow, something is seriously wrong there. The shape of that back sear/disconnect looks odd, it's too high.

Try moving it when the hammer is forward, do they feel similar?

I really have no idea, it's not even close to those hooks. Is the other side closer/touching the hooks? How is it even staying back right now?

Damn.... I don't even know what to say there. I will say the trigger on my old Norinco actually had pieces that wee misshapen, and the trigger sear was actually crooked, but I'd be surprised if yours was like that? That's very hard metal too, I'd almost expect it to break before bending, so who knows?
 
I was being a little sarcastic when I posted the photo's. I've obvious, look at the connection between the disconnect and the hammer. The defective trigger is hanging on by a hair, that's why it doubles.
 
You must log in or register to reply here.
Back
Top Bottom