This is an aftermarket 30 Inch 20 gauge barrel made in Italy for an MX8 series 12 gauge square mono block frame The barrels weigh 1.54 KG and are 30 inches long with a flat non-tapered rib. They are in like new condition with screw chokes by Americhoke. Included is 3 sets of chokes--sk/sk, cyl/cly, and IC/IC. Lug for forearm is later model series 4. This barrel was fitted to an MX 8 12 gauge frame, but most likely will have to be fitted to your MX 12 frame by a gunsmith. Case shown in picture NOT INCLUDED. It has a front and center bead. Price is $2195 shipped.