This Remington manufactured second variation complete breech bolt assembly is for the model 11-48 semi-auto shotgun in 12 gauge and is in very good condition with light wear. This assembly consists of the second variation breech bolt (two legs), extractor, extractor plunger, extractor spring, early 3 1/16" long firing pin, firing pin retaining pin, firing pin retractor spring, left & right links, link pin, early variation locking block, locking block pin, and the second variation slide. (file photo)