Hoping someone in here can shed some light on my dilemma. Spring of 2018 I bought an 870 express 20 gauge compact/youth new from academy for a TSS gun. Gun has been great expect for a few days ago I noticed the extractor plunger had seized. I have soaked it, beat on it, and tried to drill it to no avail. I figured well I will just buy another breech bolt assembly, easy enough. I ordered one at a good price however my breech bolt assembly slide will not fit in the new breech bolt. Express breech bolt, not wingmaster. No wingmaster parts on the gun. I'll attach pictures so it will be easier to see what I'm talking about. Were there different size bolt assemblies made? Different slides? I have tried to contact Remington and low and behold their customer service line is no longer working. I also sent an email. I'm wondering if it would be better to buy another slide and hope it fits my new breech bolt or to buy another breech bolt assembly and hope it fits my current slide. If anyone else has ran into something similar, please let me know or if you can shed any light on my situation. Thanks!