The solution may be to mount a m70 style shroud/safety?
I have done on all my ZKK 600 and 602s.
Mine are made by Ing Ragnar Hansen, Vestfossen Norway wich happens to be 6 min drive from my place. They cost a few dollars but worth every penny.

Btw- The rifle on the picture isn't mine. I just got this picture from the manufacturer of this peep sight.

When it comes to lock time I must be the first to admit that I'm not that good shot to benefit from shorter lock time.
I will shoot just as bad with or without this peep.
But I'm not that bad shot I think. I can still hit the wall of a barn- If I stand inside it shooting.

I have the Recnagel peep as well. Works ok, but I just don't like it.

Anyways- Some guys like the daughter, and some guys like the mother.
I happens to like this old style peep sight.

With a second thought. Some guys take both