AR sbr, sbs or not poss?

[MCASSgt New River]

(QUESTION TAKEN FROM SILENCERTALK.COM)

I ran across this question on ST.com and was stumped. Would some of our more knowledgable FFL/SOT folk answer this please.

ST member asks:
Hypotheticaly, if you had a .410 upper on an registered AR15 sbr lower, wouldnt you be allowed to make it less than 16in?
Or since it is a smoothbore would that be an SBS, and if so would that be another stamp to make the SBS from the SBR, or is this "just not possible?"

Thanks to all who reply!:cool:

[freakshow10mm]

A rifle has a rifled barrel. A shotgun has a smooth barrel.

If you have a SBR you must keep the barrel rifled. If you put a smooth barrel on a SBR, you need to file a F1 and make it a SBS.

Credentials My company is a Class 2 SOT.

[MCASSgt New River]

A rifle has a rifled barrel. A shotgun has a smooth barrel.

If you have a SBR you must keep the barrel rifled. If you put a smooth barrel on a SBR, you need to file a F1 and make it a SBS.

Credentials My company is a Class 2 SOT.

How is this any different from putting a slug barrel on a shotgun? This would be just the reverse, no?:confused:

[freakshow10mm]

The fact that it is designed to fire shotshells.