This Remington manufactured third variation slide with operating handle plunger & spring is for the Sportsman 48 semi-auto shotgun in 12 gauge and having the third variation breech bolt. The overall condition is very good with light wear. (file photo)

Note: Remington Sportsman 48 semi-auto shotguns with the following gauge and serial numbers have been observed with this part:

12 Gauge: 3101815, 3106473, 3111917 & 3126827