I bought this gun: Benelli Arms SPA Urbine, Italy, Model M1 Super 90, Mag. Cal 12 CL It has the black synthetic stalk, 12 gauge...probably 12 g. with cylinder choke. Trying to find out information about it. Can only find it in 20 gauge. Is this an older Benelli not made any more except in 20 gauge? Thanks in advance for any response.