This Winchester manufactured receiver extension is for the model 12 slide action shotgun in 12 gauge only and is in very good condition with light wear and a few specks of rust. (file photo)
Note: Winchester model 12 slide action shotguns with the following gauges and serial numbers have been observed with this part:
12 Gauge: 166698, 588236, 633067, 933942, 1129909, 1385282, 1664122, 1734902, 1898593 & 1907555
