Suppressors Thompson Machine suppressors ?

[Bartdog]

Local gun shop priced me a Thompson Machine suppressor rated for full auto today for $399.00, an introductory limited offer price. This can is for a 45 caliber subgun.
I checked their website out, and read a few positive reviews online. Any advice or opinions would be appreciated, as this will be my first can purchase.........Thanks.

 

[Bartdog]

I should have researched a bit more, not a new item at all, and not the best choice, as indicated by the price.