Person very familiar with NFA items

[O2HeN2]

If you're willing to mark a new serial number (in addition to what's on there)...

2 things, first to correct the above statement: You don't engrave a new serial number, you have to engrave the full name and location [on the receiver] of the entity making the SBR. No abbreviations allowed except those recognized by the post office. This can become a problem depending on how long your name is and where you live:

Millhouse Farnsworth III
Shamballah-Ashrama, CO

For example. This is why trusts with short names are good (though it doesn't help with where you live):

MF TRUST
CO SPRINGS, CO

or

CO SPGS, CO

Note the use of post-office recognized abbreviations. They're the only abbreviations allowed by the ATF. Many people get away with "COLO SPGS" for example, but they're just lucky.

Now for a suggestion. If you're going to make an SBR, especially for your first one, consider a platform that's flexible -- one that you can change calibers, etc. on. Of course, the AR15 is one obvious platform, but another is a Thompson Center G2 Contender or Encore (Or the older, plain Contender) rifles. One huge advantage of the Contender/Encore platform is that if you decide to spend money on a silencer in the future, they're stupid quiet because there's no action cycling. Plus in the rifle configuration, you can buy one at your age.

There, my free advice!

O2

[Circuits]

2 things, first to correct the above statement: You don't engrave a new serial number

You missed my point, which was describing a situation where he could submit a Form 1 now, without buying a potential host firearm first.

In the situation I described, he would have to submit a Form 1 with a serial number on it, and the chances he just happened to guess correctly what the original mfg serial number would eventually turn out to be are about zero.

Therefore, in the case of submitting a Form 1 before purchasing or knowing the serial number of the eventual donor firearm, he'd have to engrave the Form 1 serial number on the firearm when he got it.