Will not works with HW97 HW97k comes fitted with rifle.
will fit to Weihrauch standard and HW97 HW97k add on moderator.
Weihrauch 1/2 x 20 UNF Flat End Cap
This end cap allows you to connect any standard 1/2 x 20 UNF male Weihrauch moderator.
The flat end cap is designed to match the bullpup barrel or end of your shroud.
This item comes with self tightening tools (no other tools required).
Fits 177, 22, 25 and 30 caliber.
Threads size & pitch: M28 X 1
Outer diameter: 28.50mm