I found this online:
USPSA Latest Edition Rule Book, except for the equipment rules which are as follows:
Pistols
The definition of a 1911 Pistol is as follows: The 1911 Government Model as designed by John M. Browning, manufactured by Colt and adapted by the U.S. Government as a service pistol, (commonly known as a 5 inch Gov't Model).
And:
In its final form, the M1911 was a locked-breech, single-action semi-automatic pistol. It was chambered for the .45 ACP cartridge and had a magazine capacity of seven rounds. Its weight unloaded was 39 ounces; overall length was 8.25"; the height was 5.25". Sights were fixed, although the rear sight was housed in a dovetail slot that allowed it to be drifted either left or right for windage adjustments. The pistols were finished in blue and fitted with checked wood stocks.
Therefore we can conclude that a "true" 1911 has the following features
1) Produced by Colt in 1911
2) Was a U.S. Government as a service pistol
3) Has a locked-breech
4) Is a single-action semi-automatic pistol
5) Is chambered for the .45 ACP cartridge
6) Has a magazine capacity of seven rounds
7) Fixed sights
8) Blue finish
9) Wooden checked stocks.
Plus Black Majik's expertise
10) 3 safeties
11) The thumb safety: Down to fire, up for safe
12) Barrel Lug
13) Single stack
14) Internal extractor
If YOUR 1911 doesn't meet the above quallifications stop talking about MY 1911 and start talking to the hand.