Parts for .625" barrel. Also, Gunsmith recommendations.

[Armedsask]

It still doesn't explain why, if the barrel is under 18.5" from the factory and is already restricted regardless of length, why does shortening make it prohib? Where is that mentioned in the FA?

In case you don't want to read the links.

a firearm that is adapted from a rifle or shotgun, whether by sawing, cutting or any other alteration, and that, as so adapted,
- is less than 660 mm in length, or
- is 660 mm or greater in length and has a barrel less than 457 mm ( 17.99 in) in length

 

[Sqr]

it's allready a restricted AR... just don't go shorter than 4.2"

Huh?

........but you want to keep it there and avoid reclassifying it as a Prohibited.