The Shield 45 proved that a single-stack .45 ACP could be carried comfortably, at 1.1 inches wide — slightly thicker than the 9mm Shield but dramatically slimmer than the full-size M&P45. Offered with or without thumb safety. 6+1 capacity. Type: Pistol Action: Semi-Automatic Caliber: .45 ACP Capacity: 6 Year introduced: 2016, USA Weight: 20.5 oz Overall length: 6.45" Status: Active Intended use: concealed_carry, personal_defense