The extractor plunger fell out on my Remington 870 express while a friend was using it. I've found one for the 870 but wanted to check with someone who can confirm that this...
http://www.midwayusa.com/viewproduct/?productnumber=154368
will fit in an 870 express.
http://www.midwayusa.com/viewproduct/?productnumber=154368
will fit in an 870 express.