I don't believe their is a legal barrel length for hunting. As long as their is a definate determinaion that the frame is registured as a pistol or a carbine. However, their is a legal barrel length before you must SBR the firearm.
i would make sure its legal to own first. its what the atf calls a SBS (short barreled shotgun).
Short barreled shotguns (SBSs)—this category is defined similarly to SBRs, but the barrel must be at least 18" instead of 16", and the barrel must be a smoothbore. The minimum overall length limit remains 26".
my understanding with the contenders is that if you put a rifle buttstock on it, it becomes a rifle. in other words if you have a contender with a 14" 30/30 barrel and put a rifle buttstock on it, you're breaking the law.
i would consult with the PSP to be sure. your timing may be bad though.
There is no handgun registration in PA as per 18 Pa.C.S ss 6111.4
A shot gun with a barrel under 18" is regulated under the National Firearms Act and must be registered with the Federal government. You must have approval from the ATF to posses a NFA weapon. Minimum over all length for a smooth barrel shotgun is 26".
Check to see if the barrel is rifled. If it is a rifled barrel then it would be legal at that length.
Rifle barrel minimum length is 16" as stated before. Minimum overall length is 26" for a rifle. If the barrel is less than 16" it is a pistol and can not have a stock under NFA rules. If it were to have a stock it would be classified as a short barrel rifle and must be registered with the Federal Government requiring ATF approval to possess.
The ATF procedure for measuring barrel length is to measure from the closed bolt (or breech-face) to the furthermost end of the barrel or permanently attached muzzle device. Permanent methods of attachment include full-fusion gas or electric steel-seam welding, high-temperature (1100°F) silver soldering, or blind pinning with the pin head welded over. Barrels are measured by inserting a dowel rod into the barrel until the rod stops against the bolt or breech-face. The rod is then marked at the furthermost end of the barrel or permanently attached muzzle device, withdrawn from the barrel, and measured.