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
: Look for "MODEL OF 1911 U.S. ARMY" (or Navy/USMC) on the right side for early models. Later M1911A1 models may have manufacturer-specific stamps like Ithaca or Remington Rand, though Colt was the primary producer. colt-1911-military-parts
: Authentic military frames must have "UNITED STATES PROPERTY" stamped on the frame (usually above the serial number). The primary guide for centers on identifying original
