This is a newer, non-striped receiver Perazzi MT6 receiver with numbers matching Type 4 iron. MT6s are fixed trigger guns with the safety/selector on the top tang, making them great for sporting clays. It's nickel-plated and the trigger is also set up to reset with subgauge tubes. Because it is a square monobloc receiver with Type 4 forend iron, it can accept any barrels from the current production Perazzi MX8/MX12/MX2000 models (though obviously fitting required). Besides the Type 4 forend iron, if you check out the pic of the breechface, note that the lever lock release pin is at the 9 o'clock position (as on all current production Perazzis), and not at the 12 o'clock position as on the earlier MT6 versions with striped receivers and color case hardened receivers; this newer MT6 is virtually identical to the current production MX12 and MX2000S! $2400+shipping to your FFL.