Quote History Quoted:
Is there a general info that contains each model and specs?
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Not in a convenient, accurate, or updated form.
Colt does list
most of their current models on their website, but they're often split between their LE and commercial pages, and you usually need to go into the product info to get the model number, as they often use "commercial names" that are not the same as their model numbers. Also, for every current model there is, there's probably about five discontinued and/or unadvertised ones that you will have to dig for.
Abridged version (this is in no way a complete listing):
Commercial/semi-auto models:
(Model number: specs--commercial name)
6520: 16" lightweight barrel, A2 upper--"AR-15A-2 Gov't Carbine"
6721: 16" 1/9 HBAR, flattop upper--"AR-15A-3 Tactical Carbine"
6920: 16" M4 barrel, flattop--"Law Enforcement Carbine," "Sporter M4," "M4 Carbine"
6920SOCOM: 16" M4A1 HB barrel (no M203 flats), flattop--"M4A1 Carbine"
6921: 14.5" M4 barrel, flattop--"M4 LE," "M4 Carbine"
6921HBPW: 14.5" M4A1 HB barrel, pinned muzzle device, flattop--"M4 Carbine," "M4A1 Carbine"
6922: 16" M4 barrel, 1/9 twist, flattop--"Law Enforcement Carbine"
6933: 11.5" lightweight barrel, flattop--"M4 LE," "M4 Carbine," "M4 Commando"
6720: 16" lightweight barrel, flattop--"AR-15A-4 Lightweight Carbine"
6940: 16" M4 barrel, folding front sight, monolithic upper--"Law Enforcement Carbine," "M4 Carbine"
6944: 14.5" M4 barrel, folding front sight, monolithic upper--N/A
6945/6: 10.3" barrel, folding front sight, monolithic upper--N/A
6940P: 16" M4A1 HB, folding front sight, monolithic upper--"Piston Carbine"
Select Fire:
0723 (S-1-F)/0725 (S-1-3): 14.5" barrels (various), A2/FS upper--"M16A2"
0727 ("")/0729 (""): 14.5" barrels (various), A2 upper--"M16A2"
0733 ("")/0735 (""): 11.5" lightweight barrel, A2 or A2/FS upper--"M16A2," "Commando"
0777 ("")/0779 (""): 14.5" barrels (various), A2 upper or A2/FS upper--"M4/M16A2E"
0977 ("")/0979 (""): 14.5" M4 barrel, flattop--"M4 Carbine"
0933 ("")/0935 (""): 11.5" lightweight barrel, flattop--"M4 Carbine," "M4 Commando"
0920 (S-1-3): 14.5" M4 barrel, flattop--"M4 Carbine" *U.S. Gov't Property Model
0921 (S-1-F): 14.5" M4 barrel, flattop--"M4A1 Carbine" *U.S. Gov't Property Model
0921HB (S-1-F): 14.5" M4A1 HB, flattop--"M4A1 Carbine" *U.S. Gov't Property Model
0923 (S-1-F): 14.5" M4A1 HB, folding front sight, monolithic upper--"Advanced Piston Carbine"/"APC"
*"CK" suffixes usually imply "Conversion Kits," i.e., sold as upper assemblies rather than complete rifles, e.g., a 6921CK is a 6921 upper assembly
** "SP" suffixes usually imply "Special Purpose" guns, and can be quite different from their original model numbers, e.g., the 6921SP was a SAW special-order carbine, which was a 10" (not 10.5" or 10.3") barreled carbine
~Augee