I have a nice complete set of Briley Side-Kick Chamber inserts for sale. This set will convert your 12 gauge to be able to shoot 20 ga, 28 ga and 410 bore shells. They are in very good shape. This set was used in a Beretta DT-10, but I spoke with Briley and was told they will work for the following guns: Krieghoff, Perazzi, Beretta (Mobile and Optima), Rizzini, Zoli, Caesar Guerini, SKB, Blaser, LC Smith, Parker, Remington Peerless and Browning Superposed. This set sells new from Briley for $749 plus shipping. Price for this set is $450 shipped in the CONUS. Please PM me with any questions. Thanks. Garrett
The following is the description for this set from Briley's website:
"For 12 Gauge O/U and SxS barrels. The set includes 20 Ga, 28 Ga and 410 Bore and comes with a carrying case, a hammer and extended knock out rod. Simply drop the side-kick tube into the chamber of your barrel, line up the extractors with the ejectors, lightly tap into place and you are ready to go. Approximate weight per set: 20 ga 3.5 oz; 28 ga 4 oz; 410 bore 8 oz.
Please note that you may need to have a trigger conversion so your triggers will reset due to the low recoil of the 410 ammunition.
The tensioning method that is employed to retain it in the chamber is a nylon "button" that is implanted into the side of the chamber."