Photo 26 of 68, Colt Model 603 (XM16E1, M16A1 Army)

In 1967 the Army adopted the XM16E1 as standard as the M16A1, additional changes were the full fence lower, later buffer & tube (which were actually adopted on the XM in 12/66), "birdcage" closed flash suppressor (although the cage could be found on XM16E1's & the 2nd style 3 prong could also be found on A1's), early A1's started w/chrome lined chambers, then bores were also chromed by 68-69.

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Late 70's era M16A1 In 1967 the Army adopted the XM16E1 as standard as the M16A1, additional changes were the full fence lower, later buffer & tube (which were actually adopted on the XM in 12/66), "birdcage" closed flash suppressor (although the cage could be found on XM16E1's & the 2nd style 3 prong could also be found on A1's), early A1's started w/chrome lined chambers, then bores were also chromed by 68-69.
Photo 26 of 68, A1 R.jpg, 80KB, 1346x412, 4089 Hits Other Sizes: Original
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