Photo 17 of 68, Colt Model 603 (XM16E1, M16A1 Army)

Another view of the 2nd style front sight base, these also had no markings (other than the pre-mentioned sight mkgs on top), also shown is the 2nd model flash suppressor, the 601 used a similiar earlier style, known as the "duckbill", it had 3 prongs but was straight in profile, it was improved by turning the profile "in" on the 2nd, these were eventually replaced by the 3rd style, "birdcage" shown on the A1 later in the album.

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XM16E1 front sight base & muzzle Another view of the 2nd style front sight base, these also had no markings (other than the pre-mentioned sight mkgs on top), also shown is the 2nd model flash suppressor, the 601 used a similiar earlier style, known as the "duckbill", it had 3 prongs but was straight in profile, it was improved by turning the profile "in" on the 2nd, these were eventually replaced by the 3rd style, "birdcage" shown on the A1 later in the album.
Photo 17 of 68, XM16E1 R Mzzl.jpg, 89KB, 1144x539, 2671 Hits Other Sizes: Original
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