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LM4 Tear Down Guide


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#21 Nitemare

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Posted 05 June 2012 - 06:18 PM

Thanks for the tip. Finally got the sucker off. Was able to sand and file down just as you did. Also gave her a good cleaning and lube!

#22 CHEEKSx36

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Posted 07 June 2012 - 03:30 PM

How long did you heat up the delta ring for? I tried taking mine off and it's on there pretty tight

#23 BoobieM4H

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Posted 07 June 2012 - 05:19 PM

View PostCHEEKSx36, on 07 June 2012 - 03:30 PM, said:

How long did you heat up the delta ring for? I tried taking mine off and it's on there pretty tight
heat the delta ring/barrel nut assembly until its pretty warm..almost hot..mine was on really tight..had to use a polymer vice block to hold the upper receiver in a vice and wrench it off..but dont heat it up too much..and are you using an armorers wrench?

#24 dobey

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Posted 08 June 2012 - 03:32 AM

Mine was hot enough I couldn't hold it in my hand when I got it off.

#25 niko_gpsy

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Posted 08 June 2012 - 01:03 PM

View PostBoobieM4H, on 07 June 2012 - 05:19 PM, said:

heat the delta ring/barrel nut assembly until its pretty warm..almost hot..mine was on really tight..had to use a polymer vice block to hold the upper receiver in a vice and wrench it off..but dont heat it up too much..and are you using an armorers wrench?
I didn't have to heat mine.  I just tapped it once the armorers wrench was on and it knocked it loose.  Didn't want to use heat near the bucking if I didn't have to.

#26 Boss302

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Posted 14 June 2012 - 01:28 PM

Still can't figure out how you remove the c-clip, I'm using a small screw driver but it keeps sliding around.

#27 BoobieM4H

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Posted 14 June 2012 - 01:43 PM

Ill do a video later on how to take it off..you'll need two small flathead screwdrivers.

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#28 Nitemare

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Posted 14 June 2012 - 09:05 PM

Any tips on first time removal of the hand guards? I'm pulling decently hard on the delta ring and it's not budging.

#29 Jatodude

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Posted 14 June 2012 - 09:16 PM

View PostNitemare, on 14 June 2012 - 09:05 PM, said:

Any tips on first time removal of the hand guards? I'm pulling decently hard on the delta ring and it's not budging.
I can't remember where I posted this but it worked for someone else.  Put the butt of the stock on the ground, with the barrel of the gun facing towards you while standing up.  Use both of your index fingers and thumbs, and use your weight to push it down.

#30 Nitemare

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Posted 14 June 2012 - 11:27 PM

Yeah, I ended up finding that tip. At first I was worried because it wasn't working, then it finally popped and now it's easy as pie to pull back.

#31 R_King91303

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Posted 15 June 2012 - 07:54 AM

View PostNitemare, on 14 June 2012 - 11:27 PM, said:

Yeah, I ended up finding that tip. At first I was worried because it wasn't working, then it finally popped and now it's easy as pie to pull back.

Yea, the LM4 didn't like to give it up easily the first time...


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#32 dazdarren

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Posted 19 June 2012 - 02:08 AM

How do you get the first metal piece out from the bolt at picture 3,4 post 2?

#33 Outlaw1995

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Posted 19 June 2012 - 11:17 AM

Make sure the piece is facing down to the ground so gravity can do its work. Give the bolt a good shake and the piece should stick out... then pull the piece rearwards and it should come out.

#34 Boss302

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Posted 19 June 2012 - 01:19 PM

Is the barrel nut a CW or CCW thread?

#35 niko_gpsy

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Posted 19 June 2012 - 01:29 PM

CW

#36 Boss302

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Posted 19 June 2012 - 03:45 PM

Can't seem to get the Barrel nut off of my LM4, will this help http://www.midwayusa...block-set-ar-15 Is there a cheaper alternative?

#37 BoobieM4H

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Posted 19 June 2012 - 03:52 PM

View PostBoss302, on 19 June 2012 - 03:45 PM, said:

Can't seem to get the Barrel nut off of my LM4, will this help http://www.midwayusa...block-set-ar-15 Is there a cheaper alternative?

That's actually really cheap and a good investment if you own a few ar's..and yes this will help you out a lot in removing the barrel nut. I used something similar to this.

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#38 Boss302

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Posted 19 June 2012 - 04:12 PM

Do you think it will be compatible?

Edited by Boss302, 19 June 2012 - 04:13 PM.


#39 BoobieM4H

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Posted 19 June 2012 - 04:22 PM

View PostBoss302, on 19 June 2012 - 04:12 PM, said:

Do you think it will be compatible?

I want to say yes..I don't have any user experience with this particular model..you might have to mod the product to fit..its worth a try...

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#40 niko_gpsy

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Posted 19 June 2012 - 04:32 PM

I don't use that. I just place support under the M4 and use the armorers wrench. I didn't even have to use a heat gun to remove the nut on my LM4.
A second set of hands will definitely help.




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