This Remington manufactured magazine spring retainer is for the model 11-48 semi-auto shotgun in 16 and 20 gauge and is in near excellent condition with light wear. This retainer measures approximately .860" in diameter. (file photo)
Note: Remington model 11-48 semi-auto shotguns with the following gauges and serial numbers have been observed with this part:
16 Gauge: 5522646, 5529558, 5550951 & 5564860
20 Gauge: