Yep, takes the same backstraps...see this link http://www.carl-walther.de/public/downloads/manuals/2688468_j_ET_P99_DAO.pdf it's part no. 38. I'd say wait a month or two and call Walther customer service and you should be able to order what you need.I have a P990 that I am quite fond of and love carrying, but I bought it used and thus the extra back straps did not come with it. Does anyone know if the backstraps of the P99's and P990's are interchangeable? and where can i find them for sale?
Walther just established a new customer service operation in the USA, and things are still working themselves out.Why do I need to wait two months?