Propper response is "Fuck the fuck off, you fucking fucker."
Section 46.05 deals with prohibited items, and at one time had a line item for suppressors. That seems to now be gone. Note that the referenced page is the official statues from the state .gov site. So, I would surmise that, at least in Texas, not even State level law enforcement needs to be shown a tax stamp...
Sec. 46.05. PROHIBITED WEAPONS.
(a) A person commits an offense if the person intentionally or knowingly possesses, manufactures, transports, repairs, or sells:
(1) any of the following items, unless the item is registered in the National Firearms Registration and Transfer Record maintained by the Bureau of Alcohol, Tobacco, Firearms and Explosives or otherwise not subject to that registration requirement or unless the item is classified as a curio or relic by the United States Department of Justice:
(A) an explosive weapon;
(B) a machine gun; or
(C) a short-barrel firearm;
(2) armor-piercing ammunition;
(3) a chemical dispensing device;
(4) a zip gun;
(5) a tire deflation device; or
(6) an improvised explosive device.
(b) It is a defense to prosecution under this section that the actor's conduct was incidental to the performance of official duty by the armed forces or national guard, a governmental law enforcement agency, or a correctional facility.
(c) Repealed by Acts 2015, 84th Leg., R.S., Ch. 69 , Sec. 2, eff. September 1, 2015.
(d) It is an affirmative defense to prosecution under this section that the actor's conduct:
(1) was incidental to dealing with a short-barrel firearm or tire deflation device solely as an antique or curio;
(2) was incidental to dealing with armor-piercing ammunition solely for the purpose of making the ammunition available to an organization, agency, or institution listed in Subsection (b); or
(3) was incidental to dealing with a tire deflation device solely for the purpose of making the device available to an organization, agency, or institution listed in Subsection (b).
(e) Except as otherwise provided by this subsection, an offense under this section is a felony of the third degree. An offense under Subsection (a)(5) is a state jail felony.
(f) It is a defense to prosecution under this section for the possession of a chemical dispensing device that the actor is a security officer and has received training on the use of the chemical dispensing device by a training program that is:
(1) provided by the Texas Commission on Law Enforcement; or
(2) approved for the purposes described by this subsection by the Texas Private Security Board of the Department of Public Safety.
(g) In Subsection (f), "security officer" means a commissioned security officer as defined by Section
1702.002, Occupations Code, or a noncommissioned security officer registered under Section
1702.221, Occupations Code.
Edit; House Bill 957 removed silencers from the prohibited items list in 2021, effective Sept 2021.