The successor to the infamous SPAS-12, the 15 was shaped more like a rifle than a traditional shotgun. In some ways it could be said the 15 was the precursor to rifle patterned shotguns like the Saiga, Vepr, Origin, Safir, Akdal and others. Like the SPAS-12, the 15 was capable of shooting in semi-auto and pump-action. Very rare and sought after, they tend to run in the $4,000 to $5,000 price range depending on configuration; it was available with a folding stock too. (GRH)

Franchi Spas 15 dual-action Combat Shotgun. 

Franchi S.P.A.S. 15 12 gauge shotgun. Rare original pre-ban assault shotgun with pump or semi-auto operation. Less than 200 were imported. Has a fixed stock and an extra folding stock. From the makers of the famous Spas-12 shotgun, this is one of the rarest and most desirable of the pre-ban assault guns. 

Spas 15 combat shotgun.