The Mauser M2 is a Mauser branded handgun offered in the United States. It is a self-loading double-action pistol offered in .45 ACP initially, and later in .40 S&W and .357 SIG. The Mauser M2 is dimensionally similar to the SIG P229 pistol, also manufactured by SIGARMS.
The Mauser M2 is a recoil operated, locked breech semi-automatic firearm. It uses short barrel recoil with rotating barrel locking. The handgun has DAO trigger with striker firing (no hammer). Mauser M2 features numerous safeties: automatic firing pin safety, trigger bar disconnector, loaded chamber indicator. Moreower, the manual safety is available as option. The manual safety is located in unusual place - at the rear side of the frame, under the place where the hammer usually may be found. Also, M2 features aluminium alloy frame with steel slide and replaceable slide rails.
M2 is reported as a comfortable, compact sidearm. The only minor drawback of M2 is its rotating barrel sheme, that requires good lubrication of the rotating barrel to operate properly.
The Mauser M2 was offered by SIGARMS, though by 2006, it no longer appeared on their website. SIGARMS purchased the Mauser name for pistol manufacture in 1999. This pistol also is no longer supported by SIGSAUER nor Mauser Jagdwaffen GmbH. It has not been imported by SIG in over four years, and the Mauser Oberndorf plant where the M2 was manufactured has been closed.