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  ABOUT THE GUN The hammer fired, single action only (SAO) 1911 uses a single stack magazine with capacity dependent on caliber and model. The biggest differences between most 1911s are the size of the frame and barrel type. While many modern manufacturers have given their guns unique names to designate sizes, the original Colt designations are still the standard. You should also be aware that some manufacturers will mix slide and frame sizes to create new combinations. Pay attention to these differences when ordering holsters, replacement parts such as custom grips, and magazines. Government: 5″ barrel, full sized frame & grip – 7 or 8 round magazine Commander: 4 1/4″ barrel, full sized frame & grip – 7 or 8 round magazine Officers: 3″ barrel, short frame – 6 or 7 round magazine Note: Several manufacturers produce a high capacity, double stack version of the 1911. This modern version known as the 2011 has helped keep the venerable John Browning design in use by elite federal a