Walther PPS M2 ECO, Semi-automatic, Striker Fired, 9MM, 3.2 Barrel, Black, 8 Rounds, 1 Magazine 2902532 Upon its release, the PPS series transformed the industry by introducing a polymer single-stack concealed carry pistol, effectively establishing a trend that remains popular still today. The PPS M2 is a more refined version of that original design, now measuring only 1" thick! It is the ultimate representation of Walther's world-renowned performance catered to the expectations of the modern shooter.