http://en.wikipedia.org/wiki/Colt_Commander
Colt Combat Commander (1970+)
Chambering: 9x19 mm Parabellum, .45 ACP, .38 Super.
Barrel Length: 4.25-inch.
Overall Length: 7.75-inch.
Weight: 36 oz. / 2.25 lb. (1.02 kg.)[Steel model]. 37 oz.
2.31 lb (1.05 kg.)[Stainless Steel model]
Finish: Available in Blued and Nickel-Plated steel or
stainless steel.
Features: All-steel construction (frame and slide).
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So your gun is NOT a complete Colt.
The Frame is NOT from a Combat Commander.
And technically it's NOT a 1911.
