: 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
: 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.
: Critical for authenticity. Genuine military barrels often feature small proof marks (like "P" or "HS") on the lug or above the chamber.
: 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
: 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.
: Critical for authenticity. Genuine military barrels often feature small proof marks (like "P" or "HS") on the lug or above the chamber.