offense if he intentionally or knowingly possesses, manufactures,
transports, repairs, or sells:
(1) an explosive weapon;
(2) a machine gun;
(3) a short-barrel firearm;
(4) a firearm silencer;
(5) a switchblade knife;
(6) knuckles;
(7) armor-piercing ammunition;
(8) a chemical dispensing device; or etc, etc, etc...
I think the "automatic" feature might rule it out also, but here it is as per the Texas Penal Code. Sounds like a no-no to me. Better leave your armor-piercing bullets at home, too.
JLaw