MIM cylinder stop in pre-MIM 66?

[P71]

I have a 66-1, looking to start collecting some extra parts for the future. Among the items that is currently in stock at Brownells is the Cylinder Stop, MIM part no. 215080000 - is this compatible for use and fitting with the older pre-MIM revolvers?

 

[tomcatt51]

is this compatible for use and fitting with the older pre-MIM revolvers?

Yes, they work. They're frequently necessary when swapping forged triggers for MIM triggers.