: 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.
If you are verifying parts for a specific restoration, these physical changes were introduced in 1924 to create the A1 variant: M1911 (Original) M1911A1 (Improved) Arched (curved) Trigger Long, smooth Short, checkered Frame No cutouts behind trigger Finger relief cutouts added Grip Safety Short spur Longer spur (to prevent "hammer bite") Hammer Spur Grips "Double Diamond" walnut Checkered plastic (standardized later) 3. Sourcing and Maintenance Colt 1911. Is it a "Black Army"? colt-1911-military-parts
: Critical for authenticity. Genuine military barrels often feature small proof marks (like "P" or "HS") on the lug or above the chamber. : Look for "MODEL OF 1911 U
: Authentic military frames must have "UNITED STATES PROPERTY" stamped on the frame (usually above the serial number). If you are verifying parts for a specific
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