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Im starting to get frustrated and disappointed


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#1 FlubberDucky

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Posted 07 May 2013 - 03:27 PM

Ok well my lm4 has been giving me nothing but problems lately and im starting to get angry because these things are just starting to be little sensitive babies that break apart by themselves, need day to day care, and cant take a small beating or anything at all. Since the damn bolt catch crapped out and the hop up is starting to fail little by little with horrible accuracy, i put my lm4 for about a month. It was shooting fine and cycling and everything. No problems. Now i pull it out and attempt to shoot a mag and after the first 5 shots the bbs just started flying out at like 100fps. Then i noticed the bolt was not closing all the way and the nozzle wouldnt go back into the bcg. I opened the gun up and in the bolt i found the damn spring all bunched up and broken. Great. Another problem for this damn thing.

Photo: http://s1337.photobu...dd5a17.jpg.html

#2 General Pickle

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Posted 07 May 2013 - 03:56 PM

Perhaps your inner nozzle was twisting in the bolt? Do you still have part #36-1? If that part is missing then it may explain a lot of things. As for the hop up issues, are you still using the stock bucking and arm etc.? Mine was having issues like that pretty much since day one, so I attribute that to a crappy hop design. Once I put the EVO II in I'll see if that was in fact the problem. I found that after replacing the stock o-ring in the nozzle with the green HFT set I was getting better results, though it seems the hop up is still the limiting factor.

#3 -wigs-

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Posted 09 May 2013 - 02:28 PM

If you haven't been cleaning it after every game then the gunk build up could have cause the nozzle to stick. You have to give them a good cleaning and light lube after good use. It's a gbbr not an aeg. Judging by your pics that bolt looks bone dry and the nozzle dirty.

Edited by -wigs-, 09 May 2013 - 02:36 PM.


#4 muffinman1604

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Posted 11 May 2013 - 07:58 PM

If you are not taking care of your gun, that is your issue. as -wigs- said, you need to clean and lube your gun more often. cleaning and lubing after every game is what I do. and if the gun has been in storage for a little while it gets cleaned and lubed before i put it through heavy use.

#5 FlubberDucky

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Posted 14 May 2013 - 02:10 PM

i take care of my gun like crazy and the only reason it was dry there was because i took it out since it freaking broke and wiped it off so that i could grab it without having nasty dirty hands afterward. This thing is seriously turning out to be a baby and breaking for every single little thing. Everyone on the forum has problems with it geez.

#6 The Nutty Professor

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Posted 14 May 2013 - 03:25 PM

The ONLY problem I had was removing the delta ring. No issue at all so far. I clean it like my RS and go. I have yet to touch a mag. I bought 5 PMags from Snoopy and won't touch them until I start field play. I just train hard with Stanags now and leave gas in them. I have no not one complaint...except I want a LM4C and to build a LM4-DMR HAHA but not the money to do it. Calm down brah AEG's are 20 times the headache.

#7 -wigs-

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Posted 14 May 2013 - 03:28 PM

You wouldn't have nasty dirty hands if youve done regular cleaning and maintnance. I've had one problem that was user error, that's it and I've tossed the gun, dropped the gun, smacked into things with it, accidentally filled my muzzle and breach with mud when I sank in a lake and Play 7-8 hr games every Saturday where I run it like my real steel.  Never babied just always cleaned. The one time I ran it for a two day op without cleaning was when my return spring broke, the nozzle was so dirty it stuck

#8 R_King91303

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Posted 14 May 2013 - 07:25 PM

Couple of things to consider:

#1 When storing a gun (gbb airsoft or firearm) it is best to thoroughly clean and lubricate the gun prior to storing. Failure to do so may cause leftover residue to harden, thicken, or cause the degradation of parts. If any of that occurs it can AND will lead to weapon failure.

#2 Based on the description of the residue in your case, it sounds like you may be using propane. If this is the case refer back to point #1. When using propane, cleaning needs to be performed more frequently.





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#9 FlubberDucky

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Posted 15 May 2013 - 07:35 PM

What i mean is that it pisses me off how the damn bolt catch fails all the damn time because its made wrong so its always wearing out and it never locks back for me and i have already shaved it down and everything. Now this happens...great now i got no lm4

#10 General Pickle

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Posted 15 May 2013 - 08:02 PM

What did you do to your bolt catch? I only bent mine slightly downward so that the mags would activate it more easily, so far I have had the bolt lock every time when it's supposed to and never when it wasn't supposed to.

#11 FlubberDucky

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Posted 16 May 2013 - 08:35 AM

 General Pickle, on 15 May 2013 - 08:02 PM, said:

What did you do to your bolt catch? I only bent mine slightly downward so that the mags would activate it more easily, so far I have had the bolt lock every time when it's supposed to and never when it wasn't supposed to.

I had to shave down the bolt face because it wouldnt lock back anymore and it still wont lock back so well. I think it has to do with me using a heavy buffer...anyway whatever i cant even use my lm4 with its broken bolt right now

#12 netpoc

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Posted 16 May 2013 - 03:40 PM

Are you running a shaved rocket valve? If so, that changes the amount of gas operating the blowback system. Either replace the stock buffer or get a buffer tube spring with less tension on it.

#13 General Pickle

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Posted 16 May 2013 - 05:16 PM

 FlubberDucky, on 16 May 2013 - 08:35 AM, said:

I had to shave down the bolt face because it wouldnt lock back anymore and it still wont lock back so well. I think it has to do with me using a heavy buffer...anyway whatever i cant even use my lm4 with its broken bolt right now
Using the heavy buffer is probably a large part of your problem. I'm not sure why you would need to shave the face of your bolt, but from what I've heard about other people using heavy buffers that will wear down your bolt stop components faster, leading to the bolt not locking back. I can't be 100% sure but this sounds like user error to me, as I stand by the saying 'if it ain't broke don't fix it.'

#14 akiraspeedstar

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Posted 16 May 2013 - 06:20 PM

He's shaving the area on the bolt where it contacts the bolt stop to square it up. Heavier buffers wont really cause much of an issue unless it's not cycling/travelling correctly.

A couple of reasons why the bolt wont lock

1) The piston isn't fully seating or retracting into the bolt carrier. This blocks the bolt stop from raising as it should. Ensure the o-ring is lubricated and that there's no dirt or debris.

2) magazine is dirty causing the levers not to lift properly or lift at all.

3) If bolt mod was done, the spring may be too stiff preventing the bolt from lifting as quick as it should.

4) bolt is not cycling/traveling as it should which reduces the time the bolt stop has to rise.

5) Bolt carrier face is heavily deformed, which isn't the root cause just a symthom from another issue.

Edited by akiraspeedstar, 16 May 2013 - 06:30 PM.


#15 -wigs-

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Posted 17 May 2013 - 02:57 AM

What buffer are you using ?

#16 FlubberDucky

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Posted 17 May 2013 - 04:32 PM

im using a cut down a2 dpms buffer for more recoil cause i like recoil on my gbbr

#17 akiraspeedstar

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Posted 17 May 2013 - 05:12 PM

That may be your problem, did you uncoil any coils on the buffer spring to reduce the spring noise while firing?

Anyways I had bolt lock issues with the a2 as well and it turned out to be that the spring was binding up. It wasn't noticable when firing or pulling on the charging handle but was when I pushed the buffer with my finger.

I changed the spring and the bolt catch issues stopped. Try to change the spring or use your OEM buffer again and see if your troubles go away.

#18 FlubberDucky

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Posted 17 May 2013 - 08:08 PM

 akiraspeedstar, on 17 May 2013 - 05:12 PM, said:

That may be your problem, did you uncoil any coils on the buffer spring to reduce the spring noise while firing?

Anyways I had bolt lock issues with the a2 as well and it turned out to be that the spring was binding up. It wasn't noticable when firing or pulling on the charging handle but was when I pushed the buffer with my finger.

I changed the spring and the bolt catch issues stopped. Try to change the spring or use your OEM buffer again and see if your troubles go away.
im not gonna change the buffer cause i like recoil and im not going back to the stock one. And no i didnt uncoil any coils either i simply changed the buffer lock and stuck that one in. My main problem here is i dont know wtf to do about that broken spring inside the bolt since im a newbie at that specific stuff

#19 General Pickle

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Posted 17 May 2013 - 09:02 PM

 FlubberDucky, on 17 May 2013 - 08:08 PM, said:

im not gonna change the buffer cause i like recoil and im not going back to the stock one. And no i didnt uncoil any coils either i simply changed the buffer lock and stuck that one in. My main problem here is i dont know wtf to do about that broken spring inside the bolt since im a newbie at that specific stuff
You're going to need a new nozzle return spring no matter what you do. I'm fairly sure you can order one at the pro-shop, looks like part # 76. If you're unwilling to change your buffer then I'm afraid there's not much we can do for you. The buffer is the most probable cause of these issues, so it would be wise to slowly begin putting stock parts back in to deduce which part is causing the issue.

#20 netpoc

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Posted 17 May 2013 - 10:08 PM

If you want to use the heavier buffer you need to use a weaker buffer spring, such as the one from a G&P WA gbbr. I had the same problem and that is how I addressed it.




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