This Remington manufactured late variation locking block is for the model 11-48 semi-auto shotgun in 16 and 20 gauge having the late variation breech bolt without feet and the late variation slide. This locking block is in very good 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:

16 Gauge: 5522646, 5529558, 5550951 & 5564860

20 Gauge: