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Custom LM4 Upper

upper receiver 416 HK416 hk416 lm416 LM416 custom mod

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#61 akiraspeedstar

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Posted 11 December 2012 - 03:34 PM

I tapped the upper receiver for the screw that the JG originally used. I'm still able to put back in the OEM rail as if I didn't do it.

#62 BeachEMT

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Posted 11 December 2012 - 06:07 PM

Fair enough. I would just rather it be able to be attached to an unmodified receiver. There's just a lot of house work and repairs ahead of this project on my to do list. :( Hopefully, I will have a chance to finish it up in the next couple days.

What kind of bit did you use to mill out the nut? I was using some steel dremel bit but I think I might need to step it up to carbide.

Edited by BeachEMT, 11 December 2012 - 06:39 PM.


#63 akiraspeedstar

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Posted 11 December 2012 - 06:13 PM

I was using sanding bits and some metal shaving bit, just picked up a tungsten carbide bit. Should be fine for me as I just have a little more to go.

Edited by akiraspeedstar, 11 December 2012 - 06:15 PM.


#64 dos_Santos

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Posted 11 December 2012 - 06:52 PM

Very classy, love it

#65 akiraspeedstar

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Posted 11 December 2012 - 09:57 PM

Yeah that Tungsten bit definitely did the trick

Posted Image

#66 freon

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Posted 12 December 2012 - 05:08 AM

Hey Akira, what do you mean by shaving the barrel nut? did you have to mod the threading?

#67 R_King91303

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Posted 12 December 2012 - 06:57 AM

View Postakiraspeedstar, on 11 December 2012 - 09:57 PM, said:

Posted Image

So when can we expect you to go in production with the conversion uppers? :wink:


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#68 akiraspeedstar

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Posted 12 December 2012 - 07:48 AM

Freon - you need to increase the inner diameter of the barrel nut as the LM4 barrel is eider than AEGs

King - yeah I'll pass haha

#69 freon

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Posted 12 December 2012 - 08:44 PM

Awesome. Someone wants to buy my VFC parts, so I'm going to get me a JG 416 with a plastic receiver now and convert the sucker.

#70 MuchMoore

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Posted 13 December 2012 - 10:23 AM

akira, that looks fantastic!

#71 akiraspeedstar

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Posted 13 December 2012 - 12:18 PM

DMR Build

Posted Image

#72 freon

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Posted 14 December 2012 - 04:44 AM

Photoshopped! :shocked:

#73 akiraspeedstar

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Posted 14 December 2012 - 08:30 AM

Nope haha, just maybe 14" of barrel extensions

#74 Rockhound117

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Posted 14 December 2012 - 09:34 AM

I think your mock suppressor needs to be longer :P

#75 dos_Santos

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Posted 14 December 2012 - 01:25 PM

Yea, it's not long enough, lol

#76 freon

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Posted 14 December 2012 - 06:16 PM

You'll also need a bipod on the end of your barrel...

Akira, I'm taking on the conversion in the coming weeks. Waiting for a good 2nd hand JG to become available for cheap and then it's convert time. (I have an asian LM4)

I'll post results and any extra mods needed for asian versions on here once I'm done. I might do mine in the 14.5" configuration with a suppressor much like yours.

Edited by freon, 14 December 2012 - 06:16 PM.


#77 Ash

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Posted 20 February 2013 - 07:12 PM

View Postakiraspeedstar, on 11 December 2012 - 06:13 PM, said:

I was using sanding bits and some metal shaving bit, just picked up a tungsten carbide bit. Should be fine for me as I just have a little more to go.

What brand of bit did you use, I just started this project and need help with the shaving part.

#78 akiraspeedstar

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Posted 20 February 2013 - 07:17 PM

It was a dremel piece sold at Home Depot, didnt cost much at all.

#79 Ash

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Posted 20 February 2013 - 10:29 PM

Thanks for the help.  I finished the conversion, I will bring it this Sunday to practice so you can take a look at it Akira.  

The rail is a little looser then I would like, what did you do to make yours solid?

#80 BeachEMT

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Posted 20 February 2013 - 11:18 PM

My rail was naturally solid. Even when it was attached to the JG AEG it had no wobble.





Also tagged with one or more of these keywords: upper, receiver, 416, HK416, hk416, lm416, LM416, custom, mod

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