The primary guide for centers on identifying original components versus modern replacements or "rebuild" parts. Genuine military 1911s fall into two main categories: the original M1911 (1911–1924) and the improved M1911A1 (1926–1945). 1. Key Component Identification
: Critical for authenticity. Genuine military barrels often feature small proof marks (like "P" or "HS") on the lug or above the chamber. colt-1911-military-parts
While most parts are interchangeable between the M1911 and M1911A1, specific external features differentiate the two military eras: The primary guide for centers on identifying original
: Authentic military frames must have "UNITED STATES PROPERTY" stamped on the frame (usually above the serial number). Key Component Identification : Critical for authenticity
: Frames often bear the initials of military inspectors (e.g., "G.H.D." for Guy H. Drewry) near the magazine release or trigger guard. 2. Physical Differences: M1911 vs. M1911A1