A guy sits in a captains chair and they bring him a tray with stripped matte finish breech bolts in it. If he needs 20 breech bolts for the Express models the installs the parts and a MIM extractor. If he then needs the next 20 for the 870 Police he grabs the extact same matte finish bolt and puts the exact same parts in them except he puts a solid steel extractor. So there is no way the exact same bolt, same finish, all the same parts but one is any smoother in any 870. The Wingmaster is the exact same bolt with a plated finish and the exact same parts as the Express except, like the P it has a solid steel extractor. the Express, Police and Wingmaster breech bolts all retail for $97 on the Remington parts list. Why? Did I mention there is only one 870? Yes, I know I put $93 in my former reply but I was giving the 2009 price. They are now $97.00
I have yet to see a MIM extractor fail or even become dull. You would then ask why I put solid steel ones in every one of my custom builds. Because that is what buyers expect is why. I have had client who stated to me that they wanted the Police model because he refused to have MIM parts in their shotgun. My reply was to tell him that I can build him a P model but it would not have a trigger as the trigger that comes in the Police trigger plate assembly is MIM and Remington only makes MIM triggers. It is just not an issue as they are as reliable as any on the market and will last longer then you will be alive to be out shooting that 870.
I have yet to see a MIM extractor fail or even become dull. You would then ask why I put solid steel ones in every one of my custom builds. Because that is what buyers expect is why. I have had client who stated to me that they wanted the Police model because he refused to have MIM parts in their shotgun. My reply was to tell him that I can build him a P model but it would not have a trigger as the trigger that comes in the Police trigger plate assembly is MIM and Remington only makes MIM triggers. It is just not an issue as they are as reliable as any on the market and will last longer then you will be alive to be out shooting that 870.

-- Rifle, Pistol, Shotgun
Keep it "Practi-Cool" 
Kevlar on.

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