Wyatts mag box help

[JD250]

Hey guys I'm currently having a 6.5 saum built off a defiance medium action(same as rem sa) and my actionnis machines by defiance to work with the wyatts extended mag box my question is which one do I need to buy I've never bought one for any of my guns so I'm a little confused so if someone could shed some light on this for me I would greatly appreciate it and which spring and follower if I need something different than a factory sa spring and follower.
Thanks guys

 

[FURMAN]

Give them a call. They will tell you what you need.

 

[AKGuide]

wyatts come with the box and follower in their centerfeed designs. Not sure about the others, the stock spring works well with the two I had installed.

Reuben

 

[lilharcher]

Call Kevin Wyatt....he is great to deal with and very helpful.

 

[JD250]

Yeah finally got ahold of him I want his work schedule lol great guy got me all squared away thanks guys.

 

[elkaholic]

Yeah finally got ahold of him I want his work schedule lol great guy got me all squared away thanks guys.

Did he recommend a "Bainey" for your SAUM?