I think the OP is using this logic but in reverse. If his ar was origionally manufactured as a pistol, is it always a pistol?
Then by adding a 16in plus barrel and butt stock, be illegal because he would be adding it to a pistol.
70TH INDIANA STATE POLICE TROOPER BASIC ELIGIBILITY REQUIREMENTS
Only those applicants for the position of trooper, who meet certain initial standards, will be considered. If you do not meet the requirements, do not take the written test examination.
Traditional Academy Initial Standards:
1...
English and Civics Requirements for Naturalization - Lawyers.com
English
To become a US citizen, you have to show the US Citizenship and Immigration Services (USCIS) that you can read, speak, and write basic English. You'll do this during the review of your application for naturalization ...
Coroner’s jury rules officer’s shooting of driver was justified
HAMILTON — A coroner’s jury ruled Tuesday that Hamilton Police Officer Ross Jessop was justified in shooting Raymond Thane Davis to death after the Hamilton man opened fire during a late night traffic stop in January.
It...
IC 35-47-2-7
Sec. 7. (a) Except an individual acting within a parent-minor child or guardian-minor protected person relationship or any other individual who is also acting in compliance with IC 35-47-10, a person may not sell, give, or in any other manner transfer the ownership or...
IC 35-47-5-2.5
Possession of a knife on school property
Sec. 2.5. (a) As used in this section, "knife" means an instrument that:
(1) consists of a sharp edged or sharp pointed blade capable of inflicting cutting, stabbing, or tearing wounds; and
(2) is intended to be used as a weapon.
(b)...