So, in theory, a guy could build an AR pistol, and throw a 24" bbl on it and be legal.
ATF Definition of a pistol
Code of Federal Regulations Title 27 Chapter II Subchapter B Part 478 Subpart B Section 478.11
Pistol.
A weapon originally designed, made, and intended to fire a projectile (bullet) from one or more barrels when held in one hand, and having (a) a chamber(s) as an integral part(s) of, or permanently aligned with, the bore(s); and (b) a short stock designed to be gripped by one hand and at an angle to and extending below the line of the bore(s).
There is no actual regulation on overall length per ATF regulations. So far i haven't uncovered anything in MN that would go above or beyond federal code.
So, any of you internet sleuths care to show me where I am wrong? Otherwise next season i will be hunting in a slug zone with an 18" 6.8spc "Pistol"