I bought the XM1 Bull shark and love it. It is available direct from Stoeger or their dealers. I got mine for a good price from https://www.eurooptic.com/Stoeger-XM1-Bullshark-22-Cal-Suppressed-Airgun-w-Advanced-Ergo-Synthetic-Stock-H.aspxI got the 22cal and have been real happy with it's performance so far.
These look very interesting. Thanks for sharing. I've found that both Stoeger and Amazon have them for sale right now. I might try a .22. It looks like it will work for a lefty shooter which I am. Thanks