I had a 3 inch A5 and got it to work well with light loads.
What I did was change the recoil spring to one from a 2 3/4 AND a spacer to make up the difference in the spring length.
No other combination of rings or spacers was consistently successful.
Worked for me.
YMMV.

Dumb, but learning...Prof Em, BSc(ME), CAE (FYI)