After one of the most rigorous and highly competitive review processes in the history of military firearms, the SIG SAUER M17 was awarded the Modular Handgun System (MHS) contract for the U.S. Army. The M17 is a P320-based platform, and was selected for its uniquely innovative modularity, uncompromising performance, and unmatched capability. The P320-M17 closely follows the specifications of the U.S. Army’s M17.

It was truly an honor for SIG SAUER to be chosen as the U.S. Army’s choice with the M17. When the selection was announced, civilian interest in the pistol was immediate,” said Tom Taylor, Chief Marketing Officer and Executive Vice President, SIG SAUER, Inc. “We are proud to bring this P320-M17 to the marketplace to meet the substantial civilian interest, and the high demand, to own the pistol the Army uses as well as the other branches of the U.S. Military.”

https://dukessportshop.com/product/sig-sauer-p320-m17-21-round-magazines-coyote-9mm-4-7in-320f-9-m17/

Note: this model is different then in the video as this M17 does not have a external saftey.