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Brush Okie
02-20-2016, 19:08
At the range today with my reserve unit doing weapons qual.

During zero no issues

During quals my weapon functioned for the first few rounds then for some reason the trigger did not reset. I thought I had a jam, nope did it again after ejecting shell etc. I checked selector switch. Yip on fire. Racked the bolt again and it fired fine. It was almost like the sear did not reset or the safety was on. This is an A2 with burst fire. I remember hearing the burst mechanism can cause some type of malfunctions. Being a reserve unit our resources are limited however the weapon was deadlined. The weapons specialist we have took a quick look today at the range but was not sure what it was or could be. She will tear it down tomorrow and take a look. Any ideas where to start or what it might be?

And yes I did pass my quals first time around. Not my best score or anything to bragg about but I did not bolo.

Old Dog New Trick
02-20-2016, 20:08
Weird. Not enough info. Doesn't have anything to do with select fire or burst mechanism. Something wrong with gun.

CSB
02-20-2016, 21:52
Sounds like the disconnector is stuck.

Try this: (It's part of a function check):

[Clear the weapon]

Pull the bolt to the rear, let it go forward.

Selector switch on semi.

Pull the trigger (the hammer should fall) but KEEP PRESSURE ON THE TRIGGER,
do not release the trigger after the "shot."

Now, slowly, let off pressure on the trigger.

You should hear an audible "click" as the disconnector resets. The hammer should rotate a few degrees upward, then stop.

If you don't hear the "click" and see/feel the hammer jump, you have a bad disconnector.

Second test:

Pull the bolt to the rear, let it slam forward.
Put pressure on the trigger and keep pressure on the trigger.
Without ever releasing pressure on the trigger, pull the bolt to the rear
and let it go forward again. The hammer should not fall ... it's held back
by the disconnector to keep your rifle from going on uncommanded full automatic.

In other words, the disconnector will prevent the pressure on the trigger from
allowing the hammer to fall.

The disconnector serves the same function in the three round burst mode,
stopping the hammer from falling even with pressure on the trigger.

The only difference is that it cams into position every three shots.
So that is what I suspect is your problem.

Brush Okie
02-20-2016, 22:11
Sounds like the disconnector is stuck.

Try this: (It's part of a function check):

[Clear the weapon]

Pull the bolt to the rear, let it go forward.

Selector switch on semi.

Pull the trigger (the hammer should fall) but KEEP PRESSURE ON THE TRIGGER,
do not release the trigger after the "shot."

Now, slowly, let off pressure on the trigger.

You should hear an audible "click" as the disconnector resets. The hammer should rotate a few degrees upward, then stop.

If you don't hear the "click" and see/feel the hammer jump, you have a bad disconnector.

Second test:

Pull the bolt to the rear, let it slam forward.
Put pressure on the trigger and keep pressure on the trigger.
Without ever releasing pressure on the trigger, pull the bolt to the rear
and let it go forward again. The hammer should not fall ... it's held back
by the disconnector to keep your rifle from going on uncommanded full automatic.

In other words, the disconnector will prevent the pressure on the trigger from
allowing the hammer to fall.

The disconnector serves the same function in the three round burst mode,
stopping the hammer from falling even with pressure on the trigger.

The only difference is that it cams into position every three shots.
So that is what I suspect is your problem.

I did a function check later, sorry I forgot that part. It was fine in semi but in burst mode the first time it did not work correctly. The second time it did. Thanks. for the info I will talk to our weapons person tomorrow.

PSM
02-21-2016, 15:54
That's what I loved about the M-14, pop out the trigger housing group and pop in another. Hand the bad one to the armorer.

Pat

BryanK
02-22-2016, 06:39
I've seen that happen a good bit. The burst cam, the cam spring (if it's even still there), and both disconnectors need to be replaced. The burst disconnector (goose neck) tends to wear out as well on the front where it meets the burst cam. Easy fix.

Team Sergeant
02-22-2016, 15:20
Sounds like the trigger spring might be in upside down.......:munchin

Brush Okie
02-22-2016, 15:55
Our weapons specialist look at it yesterday and decided to replace the whole thing is trigger springs etc etc. She also found the gas tube was way to loose so it has two deadline items on it. Otherwise the rifle is a POS and has not had anyone take care of it. She came off active duty and likes firearms to boot. She deadlined several weapons yesterday.Thanks all for the help on this.

Old Dog New Trick
02-22-2016, 16:01
Sounds like the trigger spring might be in upside down.......:munchin

Maybe that, or, BO got excited to shoot the qual and (at some point) flipped the selector lever to bust and then squeezed off one single shot. In the process he later described he cycled the BCG enough times to reset everything. Which should but doesn't reset by returning the selector lever to safe or semi without charging the handle/BCG again. I can't remember it's been such a long time. But I do remember that 3-round bust cam causing a lot of anxiety when it worked like the engineers designed it but the user didn't.

Was so happy the day we got rid of that abomination!

BO, you hear back yet if anything was amiss? (Disregard:D)

Sdiver
02-22-2016, 16:42
Our weapons specialist look at it yesterday and decided to replace the whole thing is trigger springs etc etc. She also found the gas tube was way to loose so it has two deadline items on it. Otherwise the rifle is a POS and has not had anyone take care of it. She came off active duty and likes firearms to boot. She deadlined several weapons yesterday.Thanks all for the help on this.

Okay, I gotta ask .....

... IS SHE HOT ???

:munchin

cbtengr
02-22-2016, 18:13
Okay, I gotta ask .....

... IS SHE HOT ???

:munchin

Oh she's hot.

32002

Brush Okie
02-22-2016, 19:31
Maybe that, or, BO got excited to shoot the qual and (at some point) flipped the selector lever to bust and then squeezed off one single shot. In the process he later described he cycled the BCG enough times to reset everything. Which should but doesn't reset by returning the selector lever to safe or semi without charging the handle/BCG again. I can't remember it's been such a long time. But I do remember that 3-round bust cam causing a lot of anxiety when it worked like the engineers designed it but the user didn't.

Was so happy the day we got rid of that abomination!

BO, you hear back yet if anything was amiss? (Disregard:D)

Nope nope nope I keep a cool head and remember the fundamentals.

Place on burst

When pop up appears point in that direction

Close eyes

Jerk trigger and hold.

Let off trigger till next pop up.

Brush Okie
02-22-2016, 19:33
Okay, I gotta ask .....

... IS SHE HOT ???

:munchin

Last Thursday Mrs Okie bought herself a new Sig P220 10mm

I am NOT going to answer that question for health reasons. ;)

Joker
02-22-2016, 20:02
Last Thursday Mrs Okie bought herself a new Sig P220 10mm

I am NOT going to answer that question for health reasons. ;)

Yep, opening your trap can get you an acute case of lead poisoning. :D

Sdiver
02-22-2016, 20:16
Last Thursday Mrs Okie bought herself a new Sig P220 10mm

I am NOT going to answer that question for health reasons. ;)

Ahhhhh gotchya ....

Well, if you're unable to post a 'Yea' or 'Nay' ... Just knock twice for no and three times for yes, and if Mrs. Okie catches ya knocking, just tell her it's for educational ... errrr ... scientific purposes.

That should work. :D