Forend and Slide tube assembly ?

[Odstar]

Confused on to what length of forend & slide tube assembly to get for my mosseberg 500 combo well as the as the action tube nut. I attached a link to my cart so you can see if what i have ordered is okay for my upgrade. Also have 2 action tube nut in my cart. wanted to know which of the 2 is correct to use.
Thanks

[Odstar]

sorry here is the link

http://www.brownells.com/aspx/Store/Cart.aspx

[Stewdabaker23]

Your cart is empty.

[Odstar]

Sorry here you go


Action Tube Nut, 6-3/4"

Moss. 500 Stock/Forend Set, 12ga.
Action Tube Nut, 6-3/4"

Action Slide Tube Assembly, 6-3/4"

[-hanko]

Call Brownells...their tech support is superb.

-hanko

[appagohm]

I remember I had to do this too because I got the Mossberg 500a the one where you can't detach the forend from the charging tube.