This Remington manufactured early variation 1 3/4" long firing pin retractor spring is for the model 11-48 semi-auto shotgun and is in near excellent condition with light wear. (file photo)
Note: Remington model 11-48 semi-auto shotguns with the following gauge and serial numbers have been observed with this part:
12 Gauge: 5071108 & 5075577
16 Gauge: 5522646
20 Gauge: