Would it be legal to weld a serial number onto a home build rifle?

[fourtytwo]

I have not yet found anyone local to Sacramento that will engrave a serial number on completed 80% home built receiver.

Would it would be legal to stamp or engrave the numbers on a steel or aluminum plate and then weld the plate to the receiver?

it seems like welding would make the plate a "permanent" part of the receiver, but I have never seen this done anywhere. Something like a dog tag that meets the size and depth requirement for the numbers.

[Quiet]

Per BATFE...

A metal plate containing the firearm's serial number needs to be affixed to the firearm's receiver in such a manner that removal will destroy or significantly damage the receiver.

[paddyraid]

send your receiver to 80% arms in santa ana and let them engrave it.

[edgerly779]

Or to P & L in sgv

[Bullets&Whitewalls]

Wasn't there a guy in Lodi that would do it while you wait? For what its worth welding on a lower is not as easy as one might think. I have a guy that welds aircraft stuff and does all type of aluminum and he showed me a really messed up lower somebody had tried welding the trigger pin holes up to re drill. I am by no means saying it cant be done but even your average aluminum guy may struggle with it.

[Cokebottle]

Ya... you'd be better off milling the surface off of the anodizing and using a basic steel stamp set, then re-anodize or paint the whole thing (hardness of the anodizing is only important around the takedown and FCG holes)

[bblr]

I have a couple 80's that I'm registering as AW's. I originally had them engraved with my info, so I only needed to add the DOJ's FMBUS number. I just used a regular electric engraver with some stencils, and it turned out good enough for me. I didn't really care about the 80's, just wanted to have a few registered just in case the courts decide I can take my BB off.