727 rear sight The 727 (& earlier 723 carbines fitted w/the A2 upper) used the standard rifle rear sight w/the wheel marked 8/3 as opposed to the M4 flat top carbines which had the rear sight marked 6/3 & used the taller F marked FSB. | |
Photo 14 of 27, 727 L rr sight.jpg, 140KB, 1081x785, 2071 Hits Other Sizes: Original | |
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