Suppressor Adapter

[Z Day Resistance]

Hi all,

I would like to fit a suppressor to my GBB Umarex Walther P99 DAO, I bought a Swiss Arms universal suppressor (14mm CW + CCW) but I didn't have an adapter. I wondered whether this would work, HERE

which looks like the measurements would fit, but the inner barrel is not threaded on my P99.

Has anyone got any ideas or have experience with fitting suppressors to pistols that weren't designed to have them :lol:

Thanks in adavnce.