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Kwa Lm4 Series - 3Rd Party Compatibility List


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#281 Elx3248

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Posted 19 January 2013 - 09:17 PM

not to worry it only took about 2 hours to mod lol

#282 Viking Six (GDT-1)

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Posted 27 January 2013 - 05:52 PM

I hope this hasnt been posted before, but i was wondering if there are any Known lower receivers that are compatible with the LM4?

#283 gcw360

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Posted 27 January 2013 - 05:59 PM

View PostViking Six (GDT-1), on 27 January 2013 - 05:52 PM, said:

I hope this hasnt been posted before, but i was wondering if there are any Known lower receivers that are compatible with the LM4?
There are currently no after market recievers that are compatible.

#284 Viking Six (GDT-1)

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Posted 27 January 2013 - 06:09 PM

Thank you for the speedy response gcw. ;)

#285 gcw360

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Posted 27 January 2013 - 06:15 PM

View PostViking Six (GDT-1), on 27 January 2013 - 06:09 PM, said:

Thank you for the speedy response gcw. ;)
:gun:

#286 shaofengli

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Posted 01 February 2013 - 11:56 PM

hi, i have a question about Noveske 10 inch RIS. does it come with two versions?  AEG  & GBB? are they interchangable? the reason why i am asking is i saw a asian website is selling a Noveske 10 inch AEG RIS. i want to make sure it'll fix on LM4 before i buy it. thanks.

#287 BeachEMT

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Posted 01 February 2013 - 11:59 PM

I have a Madbull Noveske 10 inch RIS. I don't think there is a different version for GBB and AEG. I have the FSP version.

#288 ky2970

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Posted 02 February 2013 - 05:27 AM

View Postshaofengli, on 01 February 2013 - 11:56 PM, said:

hi, i have a question about Noveske 10 inch RIS. does it come with two versions?  AEG  & GBB? are they interchangable? the reason why i am asking is i saw a asian website is selling a Noveske 10 inch AEG RIS. i want to make sure it'll fix on LM4 before i buy it. thanks.

No need. The LM4 upper threads are made for AEG. I directly transferred my Madbull 10" Noveske rail from a G&P to my LM4. You should be good to go.

#289 shaofengli

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Posted 02 February 2013 - 10:23 AM

thanks guys. very good info. i'll go ahead buy one.

#290 ReD_FuRy_

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Posted 04 February 2013 - 06:38 PM

Sooooooo I have a lm4 and I am TRYING to get off the stupid delta ring I have put A LOT of torque on it with the ar-15 wrench can someone please tell me how much torque have you guys put on the delta ring to remove it I do not want to snap the receiver because there is no replacement receiver.

The rail im trying to install is Daniel Defense Omega 12 ris in tan,  I have heard it fits perfectly but I wouldnt know because I have not been able to get the delta ring OFF!
Please help me with this! Sorry if I used "bad grammar"

#291 akiraspeedstar

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Posted 04 February 2013 - 07:05 PM

Tap the wrench with a mallet and it'll come off, I know of one person who snapped his receiver, how? F**k if I know.

#292 BeachEMT

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Posted 04 February 2013 - 07:05 PM

I can't get mine off either. I tried torches, a bench vice and a huge torque wrench with no luck. I'm just sending mine in to have KWA remove it. If you do try to remove it, be careful, people have literally ripped the barrel nut and the receiver threads off the receiver.

#293 uscmCorps

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Posted 04 February 2013 - 07:19 PM

I've done quite a lot of these. A receiver vice to hold the upper receiver. A good wrench. A rubber ballet. Make sure you get a really good mating between the wrench and barrel nut, and then give it a good solid few whacks. Definitely unnerving the first couple times you have to do it. But it gets easier with each new receiver.

#294 akiraspeedstar

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Posted 04 February 2013 - 08:11 PM

View PostuscmCorps, on 04 February 2013 - 07:19 PM, said:

I've done quite a lot of these. A receiver vice to hold the upper receiver. A good wrench. A rubber ballet. Make sure you get a really good mating between the wrench and barrel nut, and then give it a good solid few whacks. Definitely unnerving the first couple times you have to do it. But it gets easier with each new receiver.

The rubber ballet is to keep you calm so you don't use an excessive amount of force...haha. Though seriously this is how I did it and it works.

#295 -wigs-

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Posted 05 February 2013 - 01:38 AM

Never just torque the wrench down with force. The rubber mallet or realy anything you can tap the wrench with is key. It's not like a rs you can't/ shouldn't just gorilla it off.

Edited by -wigs-, 05 February 2013 - 01:39 AM.


#296 snoopy

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Posted 08 February 2013 - 12:23 AM

I had to torque the cripe out of mine for the darn barrel nut to come loose. Finally did.

Side note...them KSC steel hop dial for the M4 GBB are NOT compatible with the KWA LM4. Bummer....waste of $18 + tax.

#297 akiraspeedstar

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Posted 08 February 2013 - 07:30 AM

Yeah that and the forward assist

#298 Viking Six (GDT-1)

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Posted 15 February 2013 - 11:52 AM

How are real steel rail systems on the LM4? I see some of you guys have KAC URX rails, but i was wondering about ones that have new barrel nuts, like the Geissele rails?

Edited by Viking Six (GDT-1), 16 February 2013 - 09:41 AM.


#299 ky2970

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Posted 17 February 2013 - 11:06 PM

View PostViking Six (GDT-1), on 15 February 2013 - 11:52 AM, said:

How are real steel rail systems on the LM4? I see some of you guys have KAC URX rails, but i was wondering about ones that have new barrel nuts, like the Geissele rails?

Real steel rails that are direct handguard replacements will work. However, real steel rails that are not drop ins will not work. The URX rails that many of us have are airsoft replicas.

#300 uscmCorps

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Posted 18 February 2013 - 12:28 AM

Many people, myself included, have installed rail systems that are NOT drop-in replacements. Real rail systems with proprietary or non-proprietary barrel nuts should all work so long as they are designed to work with a mil-spec upper receiver with mil-spec upper receiver threads. There is of course a caveat to all this. To make RS rail systems' barrel nuts work with the LM4 upper receiver (which does not have a mil-spec upper receiver thread per ATF requirements), you have to either force the barrel nut onto the LM4 upper receiver's threads, or recut the LM4 upper receiver's threads. I have seen plenty of people force RS barrel nuts onto the LM4 upper receiver threads ... sometimes it works, however sometimes the barrel nut doesn't go on perfectly straight and you end up with a rail that's slightly out of line. The reason for this is simple: since the receiver threads are made to a different spec, when forcefully installing the RS barrel nut onto the LM4 receiver, you're essentially deforming the upper receiver thread to conform to the RS barrel nut. This can also get even more tricky when the barrel nut is made from aluminum like some manufacturers have taken to doing (e.g. KAC's URX 3+ rails). In those cases, the upper receiver may deform, but the barrel nut may deform as well which could further compound the alignment issue.

My personal recommendation would be to recut the upper receiver's threads using a mil-spec die + handle + some patience and a little experience. I've done this many times, and do this for friends and others upon request. If you wish to do this yourself the necessary equipment to do this is out there.




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