Are the Caber 395 and MS661 piston rings interchangeable?

[markds2]

I need some help guys, HL Supply don't list caber rings for the MS661 and they say they don't have them, which does surprise me. It does appear the 395 ring will fit (56mm x 1.2mm), has anyone actually tried it?

 

[andyshine77]

All they have to be is the correct size.