Dee and Mc, can these extension magazines be had for the 870's??? I would assume so... Difficult to put on??? My ability with fixing ANYTHING is nill......
I am Mechanically DECLINED and I can do it. I need the direction for a screw driver. It is just like how Dee expalined it. Dump out the old spring and retainer. Keep the shell follower, add new spring, screw on extension cap. Add barrel band if you go more then +2. About a 10 minute project from start to finnish. (yes Dee, I know it is a three min project at best but when I have a mag tube open I tent to spend a few minutes cleaning it and lubing the spring so everything slides easy.) Also depending on the age of the remington it could either have a spring retainer or a plastic screw retainer. The spring one you need to be easy when prying it out and not to mar the mag tube. The plastic reatiner you get a #3 Phillips, push down and turn 90 degrees and it will pop out.
There are different lenghts of extentions from +1 to +5. While the idea of 9 or 10 in the gun is neat it does make the gun rather long and you will need a 26" barrel.
Check the usual suspects - Cabelas, Midway, Midsouth, Brownells, or try Cheaper than dirt.
it also adds a lot of weight to the front of the gun. While bigger guys don't notice I am only 5' 10 and I notice the front dips a little.
OH the only thing I can tell you with the extended mags and the Autos. You need either dummy rounds or the heavy metal snap caps for the gu nto function. the light Plastic snap caps are short and light and do not function in an auto manually cranked.