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Delta Ring/Barrel Nut

Barrel Delta Ring Nut

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#1 UHHHHHHHHHHHHHHHHH7

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Posted 02 August 2013 - 09:26 PM

Does anyone have any tips for loosening the delta ring initially? Mine only goes back a centimeter or so. Also, is it absolutely necessary to have an AR wrench to undo the barrel nut, or can it be done otherwise? I'd rather not spend 20 bucks on one if I don't have too.....

#2 General Pickle

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Posted 02 August 2013 - 09:58 PM

I think you could find a way to do it but chances are you'll totally wreck the gun and the delta ring, get a wrench and save yourself the heartbreak of a ruined gun. The ring itself should move back if you put some elbow grease into it :P

#3 yellowthunder

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Posted 03 August 2013 - 12:22 AM

I agree.  If you want to do it right then get the proper tools.  If you plan to do you're own work on the LM4 I'd highly recommend you purchase one, or pay someone to do the work for you at $20 to $30 an hour.  Trust me, it's worth it and rewarding.  If you choose to go the cheaper route with a flat head screwdriver you're going to end up with busted parts and busted fingers.  If you do get a AR15 armorer's tool make sure the barrel nut wrench has small posts on it, if it uses posts to grip the barrel nut wrench.  If you get an AR15 upper receiver vise block make sure you get the clamping type and not the bolt in lower block vise.

Edited by yellowthunder, 03 August 2013 - 12:22 AM.


#4 okay47

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Posted 03 August 2013 - 01:23 AM

Yup, I would definitely fork over some money to get a nice wrench yourself.  You're going to need tools anyway if you decide to start modding things/correcting mistakes.  I'm fortunate enough to have a variety of tools (e.g. dremel, table vice, various wrenches, hammers, punches, etc.) on hand so fixing any mistakes I've made or performing any of the common mods on the forum are straightforward.  IMO, the last thing you want is more stress if you're doing any work because that may lead to more error and stress.

FYI, when I first removed the delta ring I didn't have an AR wrench and totally wrecked the OEM ring.  I ended up having to dremel off all the teeth and using a large pipe wrench to slowly crank it off.

tl;dr buy a wrench and good tools.

#5 Chuck S

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Posted 03 August 2013 - 04:13 AM

Maintenance of the hopup unit requires pulling the barrel on the LM4.  The M4/M16 upper receiver is a monolithic machined forging, the LM4 upper is an assembly of half a dozen stamping screwed together.

Retracting the handguard slip ring is a two-man job on many guns including the 5.56mm versions.  Takes two hands to retract the ring that leaves no hands to remove the handguards.  There are handguard removal tools around but it's usually easy to get someone to help.

Removing the barrel nut without softening the thread locker is asking for a broken upper receiver.  I've never seen an explaination why KWA uses thread locker on this part (or the muzzle device).  Several threads describe the process and an AR15 "combo tool" or M16 barrel nut wrench is mandatory.

-- Chuck

#6 netpoc

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Posted 03 August 2013 - 07:05 AM

Spend $380-&480 on the gun and worry about a $20-$40 wrench that you WILL need over and over? I know it sucks buying an expensive tool, but it makes it worth it when it's easy to get the job done!




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