Failure , shooting 35,000 rounds. That number is equivalent to five or six times the pistol's service life. http://books.google.com/books?id=4eMDAAAAMBAJ&lpg=PA40&ots=u5-FQfsMA1&dq=mean%20rounds%20before%20operational%20failure&pg=PA40#v=onepage&q=mean%20rounds%20before%20operational%20failure&f=false Technical description A short recoil , semi-automatic , single-action / double-action pistol, the M9 uses a 15-round staggered magazine with a reversible magazine release button that can be positioned for either right