Posted: 10/18/2008 6:51:00 AM EDT
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Quoted: Is there really a difference in Colt's lower receivers 6721, 6921, 6933 in terms of their performance? Aren't they essentially the same? Also, other than full automatic/3 shot burst capabilities, is there any other difference between RO977/9 (military version) lower receiver and law enforcement lower receivers in terms of their performance? If there is a major difference in spec other than full auto/3 shot burst, I would like to know.  Colt's lower receivers 6721, 6921, 6933 there the same just have different letters and numbers on the aluminum.  |