Which Base for 870 20ga.

[Ranman]

Looking to put Muller or FFII on my Remington 870 20ga.  The receiver will need to be drilled and tapped, so it does not matter about the screw hole placement.  Which base fits?  I have been looking for 870 bases, but most say for 12 ga. only.  Please help.
Ranman

[sugarray]

Just find any.  Talk to your gun smith as well and get his recs.

[pullit]

I am not sure but I think I have read that a mount that will fit the Remington 742,7600 etc will fit the 20 ga receivers.
I can not say for.