Colt's 1918 production M1911 pistols represent WWI-era manufacture at peak war production, featuring the original 1911 configuration (not the later A1 improvements) with the original flat mainspring housing, long trigger, and small grip safety. These WWI Colts are identifiable by serial number ranges corresponding to 1918 manufacture and often bear British or American military inspection stamps when issued to frontline troops. They represent the original M1911 design in its most historically documented context. Type: Pistol Action: Semi-Automatic Caliber: 45 ACP Capacity: 7 Year introduced: 1918, USA Weight: 39 oz Overall length: 8.5" Status: Discontinued Military use: Yes Intended use: military, collector, historical