This model is a USA imported version of the TP9 in Switzerland. This biggest differences are the model markings, import markings, and a change to the rear sight, from ghost ring to square notch.
In 2014 B&T USA was formed, the US imports of the firearm are expected to resume next year.
Peterson, Phillip (2010). Gun Digest: Buyer's Guide to Tactical Rifles. Krause Publications, P.64. | ISBN 978-1-4402-1446-2 | ISSN 2010928614 | Amazon