Photo 28 of 68, Colt Model 603 (XM16E1, M16A1 Army)

Here you can see the full fence which now "surrounds" the mag button & most of the later parts, non-dimpled pins & selector, also note there is no hole at the very rear of the receiver extension for the roll pin for the buffer tube. The receiver shown on this rifle is actually an A2 w/reinforced areas at the receiver xtension in the rear & the pivot pin holes in front. This rifle is also shown w/the mount for the AN/PVS2 "starlight" NV scope.

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A1 upper w/Starlight scope mount Here you can see the full fence which now "surrounds" the mag button & most of the later parts, non-dimpled pins & selector, also note there is no hole at the very rear of the receiver extension for the roll pin for the buffer tube. The receiver shown on this rifle is actually an A2 w/reinforced areas at the receiver xtension in the rear & the pivot pin holes in front. This rifle is also shown w/the mount for the AN/PVS2 "starlight" NV scope.
Photo 28 of 68, A1 R Upper.jpg, 107KB, 1055x601, 2484 Hits Other Sizes: Original
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