Quote Originally Posted by SeriousStudent View Post
You know, that picture makes me wonder about an Aridus adapter mounted on the underside of that folding stock......

Hmm. Speaking as someone that has an SBS built on a 12.5" Wingmaster that I did a Form 1 on, this could be very interesting.

I'd also love to build an adapter for a Remington Tac-13, and try that folder with it.
I realize this post is old, but I just thought I'd throw it out there in case it's still relevant to the poster...

The Tac-13 uses an adapter shim to allow it to accept the Raptor birdshead grip (which is 870 pattern). I suspect (but can't confirm) that the factory 870 sidefolder would bolt right up to the Tac-13 as long as the adaptor was left in-place.