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This is model #7157. The Colt LE6940 Advanced Law Enforcement Carbine is the Tactical Operators answer to demanding situations. The advantage is unmatched. There seems to be the difference.

CR6940 has a barrel of length range of 16-16.99 LE6940 has a barrel length of 16.1 That's all I can tell Inventory may be another factor. As a customer like you I'm not privy to that information. I hope this helps.

Hi Scott and welcome. #7157, the Colt's Manufacturing M4-LE6940 has a Chrome Lined M4 Profile Barrel. The model above is not Chrome Lined. Cheers, stay safe and enjoy!