Mossberg 500 roll pins question.

[Baxter]

I have a Mossberg 500 atp. On the slide assembly it is missing a roll pin on the right hand side.
Does anyone know the size? I have contacted Mossberg by phone and e-mail and they have no idea. I really don't want to take the reciever to home depot to test fit. Thanks.

[Cobrafreak]

Do what I do, get 4 of every size and viola, you now have enough for everything for the rest of your life!