Quote Originally Posted by whitewalrus View Post
OAL should be measured with the stock folded out - rifles are designed to be shoulder fired.
Yes, for rifle.

For pistol, as I understand, the ATF recently posted a letter stating the opposite for any PISTOL that has a brace. Must be measured collapsed (end of buffer) or folded (end of receiver/folding mount).

https://blog.princelaw.com/2019/07/0...ilizing-brace/