Abandoned Civilian 416 Project :(

[HKNC]

Well I can't speak for HK, but I have put mine on hold. So close.....

[AviatorDave]

Why?

[mikecleonard]

I'm confused?

[HKNC]

I need someone that is experienced welding aluminum, knows just enough about ARs, can make a jig, pre-heat the receiver and give this thing another shot.

As is, the rear donor section of the receiver shrunk as it cooled and is shorter on one side than the other. Whole thing from the magwell back is slightly bent left to right. I wasn't going to post pictures of it until it was finished, but I have had it sitting around like this for so long that I figured maybe I could inspire a few folks.

[Chopstix Kid]

Arg! Wow man, sorry to hear about that :(

Yeah, welding has a tendency to shrink the metal a bit. A good jig and heat sink would have done the trick. Hopefully you can find someone who can reair it and complete the work.

For what it's worth, it looks REALLY good so far.

[boomfab]

Dang that's too bad.

HKNC, as you know, I know the feeling!

[sjopling]

Could we get a background on this project?

I am confused as to what was being welded.

I too hope you can find someone to fix it, looks pretty good so far.

[HKNC]

Thanks R, I dared tread where you had already and was crushed ;)

Good luck with that "married couple"

[HKNC]

Could we get a background on this project?

I am confused as to what was being welded.

I too hope you can find someone to fix it, looks pretty good so far.

Before things turned bad....

[paul123]

couple of questions for you, i had thought about doing this myself but could not find a dealer who would cut a 416 for me like this, who'd you get the mag well from???

second, the welding done is not bad, but if you want to keep it from shrinking you need to have a center heat sink machined out of a different metal like copper or stainess steel that is a perfect, TIGHT fit to the inside of the receiver halfs.

and also set it up so both the jig/heat sink have the rear take down pin hole in it, locate the hole on your forgeing. and put it all togeather with a different upper (obviously) so that when it is welded you get absolutely no chance of warpage and everything will line up perfectly.


tell you what, i got a CNC mill, i'll machine the jig out of what ever metal you want for a mag well :):):):)

oh and also is all of the writeing on the mag well engraved or laser etched on to the coating???