The M&P40 Shield was the original .40 S&W single-stack Shield, released alongside the 9mm version in 2012. Designed for .40 S&W carriers who wanted a slender backup or off-duty option matching their primary caliber. The .40 version saw a longer production run than expected due to sustained law enforcement demand, even as the civilian market migrated to 9mm. Type: Pistol Action: Semi-Automatic Caliber: .40 S&W Capacity: 7 Year introduced: 2012, USA Weight: 19 oz Overall length: 6.1" Status: Discontinued Intended use: Concealed Carry, Law Enforcement