AK Trunnion Egging

[sh4d0ww4rri0r]

This is my first demilling. I was drilling out the rivets on my trunnion and since I didn't use a center punch they were off center. This made the holes egged on the trunnion. Is this still safe to assemble?

egg1.jpg

Egging.jpg

Also, to the left of the serial number, I accidentally ground a little of the lip off. Is this going to be a big deal?

[FEDUPWBS]

Good job! Will be ok just use longer or larger rivets that will fill the hole when you smash em. I would not advise selling your build ever for liability reasons however. (if it blows up even if unrelated they will sue you).

[hawk81]

I would not use it.

[DB2]

Do a weld build.(only if you know how to weld !)

[JHC]

A good rivit job will fill that right in and you'll never have a problem, it's not any more dangereous than having egged holes in the receiver and lots of builds out ther have that hidden under the rivit heads.

[sh4d0ww4rri0r]

Thanks for the response! I think I'll hold on to it Jeff, I wouldn't want you to get hurt.

[Utha Schleigle]

A screw built is out.

The only one hole that concerns me is the lower serial # side.

I bought two pounds of 3/16 by 2inch rivits. Let me know if you want some shipped to you free - no charge.

On the upper I would add 2 more mm of height to the protuding rivit. Standard protusion from inside of trunion 6mm, plus 2mm more 8mm total inside protusion. 3/16 instead of 5/32 rivits should help also.

On the the lower serial # side (your killing me larry). I think only a 3/16 ivit is going yo get close to a mechanical strong connection and agian 8mm protusion. All heads should be really smashed and passed the razor test.

Are you going to use bolt cutter rivitor - press - air hammer to set these.

It should be OK but after setting super tight with 1.5 to 2mm head formation Test in vise. Oil gun and rivits - wipe gun off especially around rivts - put reciever in vise padded with boards - wiggle on barrell. if rivits move or belch oil or smash rivit more. Similar to check if the is a crack in the trunion. Oil - wipe - wiggle - see if wet oil spot appears.

Start looking for a new trunion if this fails.

Take a look and see if this link helps http://www.akfiles.com/forums/showthread.php?t=36469

Great gift idea for mother in law for christmass - no need to head space.

Yes this is at your own risk.

Forgot TIG welder to fill in lower egg hole then re drill/reshape.

[scotthmt]

you'll be fine, best way to get those rivets knocked out is to take the heads off and press them out, or punch them. I've never had to drill those rivets out.

[ar15barrels]

I would not advise selling your build ever for liability reasons however. (if it blows up even if unrelated they will sue you).

The same could be said of ANY gun a person builds.
If you are not a manufacturer with insurance, don't sell guns you built.

[motorhead]

should be fine for riveting. screws would require going to 1/4" X 28. front trunnion is too shallow to heli-coil. the factory s/n is unimportant, it was voided by demil for sale as a kit. to sell you need to stamp info on rec..

[mason1800]

You should of seen the egging on the barrel pin I drilled out! The pin was in there tight, until it met Mr. DeWalt.

[Harbinger]

Like has been said, RIVET ONLY and you'll be fine. Rivets fill the voids and keep you safe from harm.

Mike

[sloguy]

that serial number doesnt matter, its the reciever number that counts, if you even assign one. or did you dros a finished reciever?

[sh4d0ww4rri0r]

Tapco Flat.

[RossRinSD]

that serial number doesnt matter, its the reciever number that counts, if you even assign one. or did you dros a finished reciever?

Can you use that serial number though? If say you got an interesting number and want to keep it, can you engrave that number on the receiver? Or does it really have to be serial, as in my first build is 001, and the next one will be 002