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LM4 Tear Down Guide


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#81 DoubleA

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Posted 27 January 2013 - 09:40 AM

When I opened up my bolt and prepared to take the nozzle out, I realized it was being held in by a spring. I didn't want to break anything so I left it alone for now. Is that spring supposed to be removed? I didn't see it in the pics posted in page 1. Do I oil anything inside the nozzle besides the O ring?

#82 apilar

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Posted 27 January 2013 - 10:05 AM

Yes, there should be a spring holding the nozzle into the bolt.
That is what pulls the nozzle back into the bolt every time the gun fires and cycles.
The spring can be removed from the bolt by taking off the c-clip. - it is a pain in the a**, and tends to fly off once you do get it to 'pop' so be warned
also, you will need to remove that the little part toward the front of the bolt that looks kinda like a door - it keeps the nozzle from coming totally out of the bolt.
- oil on the o-ring should be sufficient because there is no other rubber parts in the loading nozzle.
You could always lube the outside surface of the bolt to make its cycle a little smoother.

#83 gcw360

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Posted 27 January 2013 - 10:07 AM

View PostDoubleA, on 27 January 2013 - 09:40 AM, said:

When I opened up my bolt and prepared to take the nozzle out, I realized it was being held in by a spring. I didn't want to break anything so I left it alone for now. Is that spring supposed to be removed? I didn't see it in the pics posted in page 1. Do I oil anything inside the nozzle besides the O ring?
If you go back to the first post in this thread you will see how's the bolt is torn down.

#84 The Nutty Professor

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Posted 21 March 2013 - 05:13 PM

There is no reason in hell the Delta Ring should be on that tight! And that's not loctite it's almost JB Weld!! I already bent the top rail and it's still not off. Love this rifle but come on folks!!

#85 Huntsman82

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Posted 21 March 2013 - 05:42 PM

I'm had the same issues until I heated it up. That made a world of difference

#86 gcw360

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Posted 21 March 2013 - 05:56 PM

View PostThe Nutty Professor, on 21 March 2013 - 05:13 PM, said:

There is no reason in hell the Delta Ring should be on that tight! And that's not loctite it's almost JB Weld!! I already bent the top rail and it's still not off. Love this rifle but come on folks!!
I've taken off close to a dozen recently.  The steps are:
  • Lock in a vice using a receiver block or magwell block

  • Heat with a heat gun (not a hair drier)

  • Tap armorer's wrench with a small/light hammer

  • Remove
Have you tried these steps?

#87 The Nutty Professor

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Posted 21 March 2013 - 08:14 PM

Yes I have a very nice heat gun and I heated it to the point I touched it and burned myself. Didn't work. Then I realized I was being a total idiot. I was heating the nut on the barrel side instead of the receiver side. I heated it up until I heard a crackling. That was the epoxy boiling. The nut spun right off but I'll still be ordering a complete upper because it looks tweaked. But it had to come off I had RA-Tech parts waiting to be installed. I really don't understand why the went with a 3 piece upper it's so much weaker.

Edit. Just ordered a complete new upper from KWA. Talking with the Rep was easier than I expected. He seemed new but worked at it until he got it right. New upper and a rear outer barrel was $70 shipped priority. I plan on a C-model and a full just by swapping the upper. Let's see where this goes. If nothing else I'm having a ball building!!!

Edited by The Nutty Professor, 22 March 2013 - 03:47 PM.


#88 yaiba2055

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Posted 26 March 2013 - 11:16 AM

For the delta ring, Do I have to turn counter clockwise to loose it? I already apply heat to the delta ring but it does not come off.My hands are hurt.

#89 Huntsman82

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Posted 26 March 2013 - 11:29 AM

Yes it is counter clockwise.

#90 aervanath

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Posted 28 June 2013 - 07:33 PM

Can you create one disassembling the whole trigger?

#91 ky2970

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Posted 19 July 2013 - 12:47 AM

rom Akira aka GeckoActual

#92 BoobieM4H

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Posted 21 July 2013 - 08:36 AM

https://www.youtube....be_gdata_player





#93 gcw360

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Posted 21 July 2013 - 08:54 AM

View PostBoobieM4H, on 21 July 2013 - 08:36 AM, said:

Nice job.  If it wasn't already a pinned topic it would be now.




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