[Brentv]

I have an early Arsenal SAS M7 Classic with a fixed underfolder. Has anyone converted one to a true underfolder?

 

[Templar]

Give John at Arsenal a call and he might be able to do it for you if they aren't slammed.

If not, he has the parts you'll need to then send it to someone like Troy Sellars or Mike at The Firing Line to convert it for you. There's some machining invovled.