I think the grips are original, likely just sanded hard…..the cut out for the drain is a bit odd on these, and my agv and pyy are the same. Slightly long. Kinda square tip.
The barrel is made by Waffenwerke Brunn II Bystrica use uses waaA80. It’s possible it fits as a blank BUT the number on the bottom of the site base, indicates it was assembled to a dou rifle, so not really correct in this case
The tablet I had the data on died. So I’ve not been able to get it off. There’s an earlier version on a HD I just have to try to find it.
I will try this weekend.