26. A "pistol" is defined in Section 5845 as
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). 27 CFR 178.11