Looks more like a dreamline lite to me, but I think it’s a bit expensive to take a punt on. I’d chuck a bit more money in and buy fx instead personally.
Yes I’ve used them before as well as their .22 shorts, in fact I still have some s&b .22 shorts. The subs were pretty good in my anschutz, never tried them in the cz though. Well worth a try I’d say
The .22’s are what I use the most. Anschutz 1417 bolt & CZ 511 semi-auto and ammo from bb caps to hyper velocity with everything in between makes them very versatile vermin tools.
I bought one off fleabay for £17 and it didn’t work. Got a refund and they didn’t want it sending back so I still have it. For me it was a waste of time.