Can anyone give me a quick rundown on how to disassemble a Remington 870 bolt? Specifically extractor removal and how to remove firing pin(does retaining pin come out through the top or bottom). Thanks.

The extractor is held in place by its spring-loaded plunger.   You can see the tip of this plunger pushing against the back of the extractor.

To remove the extractor, take a small, thin-bladed screwdriver and push the plunger into its hole (and away from the extractor) and hold it there.  Then grasp the extractor and pull it forward while rotating the front part in towards the center of the bolt.  It should lift out of its slot.  Don’t let the extractor plunger and spring become airborne!

Drive the firing pin retaining pin out the bottom of the bolt by using a 1/8” punch (obviously) from the top of the bolt.  It won’t work the other way since the bottom of the pin is staked (and should appear larger than the top of the pin).  Again, don’t let parts go airborne.

Remember how things are arranged before taking anything apart.  While not really necessary, if you’ve got a digital camera – take a couple of pictures.

Thanks a million, 199. Very helpful.