AR15 pistol with custom upper in straight wall pistol cartridge

I was wondering if Idaho Fish and Game considers an AR-15 pistol with a custom made 7.5" upper in a straight wall pistol cartridge like 44 Mag as legal for short range hunts?
Answer: 
A .44 Mag is a straight-walled case not originally developed for rifles and is considered legal in short range weapon hunts when fired from a handgun.  The ATF defines a handgun as: Any firearm which has a short stock and is designed to be held and fired by the use of a single hand...(27 CFR 478.11).  If you AR-15 pistol fits this definition, it would be considered legal in a short range weapon hunt.
Answered on: 
Tuesday, December 9, 2014 - 4:14 PM MST