Im looking for a choke for hevi shot that will fit a rem 870. Any brand.

there are many of them.what size shot are you going to use?the best tube diameter is .675 for hevshot.rhino has one with .660 dia for hevishot that is claimed to be the best.undertaker[hs] has a .675 dia for hevishot.here is a site i use if you cannot find a tube locally.
http://www.choketube.com/

Take a look at a wad wizard choke,It does some amazing things!

Look no farther than the Rhino for your 870, I know they are a little pricey but you won't be disappointed.