M14 GBB Bolt not always going forward all the way

[CavemanSean]

Recently I've been having a rather annoying issue with my M14;
Below is a link to a video I took showing the issue's I'm having.
M14 gbbr issue - YouTube

This M14 has been upgraded with all RA-Tech parts as well.

1: I can be firing in full auto (doesn't do this in semi...) and theres a chance where it just seems like the bolt doesn't go forward all the way so it will fire again.

2: I can be firing in full auto or semi and at random times it will leak.


I found a video online WE M14 GBBR - What to expect after 1000 rounds - YouTube and from what he's saying most of the issues seem to come from the trigger box, mine is a fully CNC'd RA-Tech so I don't believe this'll be my issue.... any ideas?

[N_Force]

First off, I'm not a gun doc and I don't have a m14, but I love to help abit to trouble shoot, and these days i may just have some extra time! And for sure i also love GBBR, i fix them all by myself.
Are you handy and able to find out the problems? If so, let's try it. If not, simply forget it.
1, how long you've been owing it and using stock parts? Was it running good before upgrade?
2, the problems you mentioned, was it happening right after parts upgraded? Do you still have the stock parts? Please list them.

[CavemanSean]

Originally Posted by N_Force

First off, I'm not a gun doc and I don't have a m14, but I love to help abit to trouble shoot, and these days i may just have some extra time! And for sure i also love GBBR, i fix them all by myself.
Are you handy and able to find out the problems? If so, let's try it. If not, simply forget it.

Handy, yupp! lets have a go then

Originally Posted by N_Force

1, how long you've been owing it and using stock parts? Was it running good before upgrade?

I purchased it 2nd hand from a friend of my roommates, when I did purchase it I put each mag through the gun without ANY issues what so ever (all the upgrades where done prior to purchasing it)

Originally Posted by N_Force

2, the problems you mentioned, was it happening right after parts upgraded? Do you still have the stock parts? Please list them.

As said above, the upgrades where all done prior to purchase, but the upgrades are as follows (and yes I do still have all the stock parts)

RA-Tech trigger assembly
RA-Tech 6.01 tight bore
RA-Tech Socom Kit
RA-Tech Metal Guides
RA-Tech Marked Breach Plate
RA-Tech Bolt Release
RA-Tech Bolt Catch
RA-Tech Bolt Stop
RA-Tech Steel Tappet
Madbull bucking

[N_Force]

You have it for a while and keep using it, and working fine. Now it starts having problem, right?
I did a bit of the m14 research, let's start from the simple way, the lubrication first, then the internal parts check.
On your video, the bolt got stuck after 4-5 shots in full auto, but you said it did not happen in semi, right? What kind of gas you're using? If propane, did you add fair amount of bb oil? It even sometimes got stuck and released entire mag gas. That could be the nozzle parts and the firing pin parts? How long you have been having the m14? When was your last lub for it? Where were the parts you lubed? If so , were they all the moving parts and contacted area even o-ring? What kind of oil and grease you were using? Think.....

[CavemanSean]

Originally Posted by N_Force

You have it for a while and keep using it, and working fine. Now it starts having problem, right?

Correct.

Originally Posted by N_Force

I did a bit of the m14 research, let's start from the simple way, the lubrication first, then the internal parts check.

Originally Posted by N_Force

On your video, the bolt got stuck after 4-5 shots in full auto, but you said it did not happen in semi, right?

Yeah, it's almost like in full auto its not getting enough gas sometimes to fully cycle the bolt (best guess?)

Originally Posted by N_Force

What kind of gas you're using? If propane, did you add fair amount of bb oil?

If I'm shooting semi auto I will use Propane & give the adapter a good serving of oil for EVERY mag

Originally Posted by N_Force

It even sometimes got stuck and released entire mag gas. That could be the nozzle parts and the firing pin parts?

Hmmm I'll have to check but when I did take a quick look at them, they seemed to be in good condition.

Originally Posted by N_Force

How long you have been having the m14?

How long have I had it? almost 2 years
How long have I had this issue? almost 3 weeks.

Originally Posted by N_Force

When was your last lub for it?

It gets disassembled after EVERY game to get a good cleaning & oiling.

Originally Posted by N_Force

Where were the parts you lubed? If so , were they all the moving parts and contacted area even o-ring?

I go by the same rules for real-steel, if it moves it gets oil... there are a fair amount of parts so I'd rather not list them all

Originally Posted by N_Force

What kind of oil and grease you were using? Think.....

For mag oil I use Tokyo Marui Silicone
For internal oil I use AIM TOP High Concentration Silicone

[N_Force]

Using propane, do you add gbb oil in the tank to fill your mag?
Top half of the gun, you clean and lub after game, how did you lub the nozzle o-ring? Any crack or damage or too dry in o-ring? I assume you clean the top internal properly and not much plastic and metal dust inside. Does the nozzle move and spring back freely? if the o-ring is good and the nozzle moving well, now try the rapid single fire in single selector mode, see if you have the same problem.
After that , we may take a look at the trigger box see if there is any losing parts could cause the problem.

[redneck12]

Have you removed the receiver from the stock and checked the op-rod and spring seems to be a really common problem with the WE M14. The attached vid will show what to look for which will cause your bolt assembly not to fully cycle and jam up.
http://youtu.be/rOQP1p38T_k

[CavemanSean]

Originally Posted by redneck12

Have you removed the receiver from the stock and checked the op-rod and spring seems to be a really common problem with the WE M14. The attached vid will show what to look for which will cause your bolt assembly not to fully cycle and jam up.
http://youtu.be/rOQP1p38T_k

Son of a bitch!
Thats it!!, mine does this to D=
Time for some creative magic to run its course!

Never would have thought of that one.

Thanks for the help!

[N_Force]

Is that it? Thanks, you save our day.

[redneck12]

Lol no prob, I don't even have a M14 but was researching before I do buy one and well I stumbled onto your thread and a few youtube vids.

[CavemanSean]

Originally Posted by N_Force

Is that it? Thanks, you save our day.

Seems to be it!, I just gorilla taped it to test, and I went 3 mags without one single lock, *knocks on wood* heres hoping its fixed!

Originally Posted by redneck12

Lol no prob, I don't even have a M14 but was researching before I do buy one and well I stumbled onto your thread and a few youtube vids.

Ah, nice.