Photo 9 of 68, Colt Model 603 (XM16E1, M16A1 Army)

The head of the early Edgewater buffer (which is round) can be seen here, the later buffer had a slightly hex shape, the early buffers were replaced w/the later style due to cycling problems. Also you can see the small hole at the rear for a roll pin which secured the buffer tube on early M16's & M16E1's, this hole was not present on late XM16E1's or any of the M16A1's, also note the dimpled takedown pin & selector shaft.

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XM16E1 Recvr xtension/buffer tube The head of the early Edgewater buffer (which is round) can be seen here, the later buffer had a slightly hex shape, the early buffers were replaced w/the later style due to cycling problems. Also you can see the small hole at the rear for a roll pin which secured the buffer tube on early M16's & M16E1's, this hole was not present on late XM16E1's or any of the M16A1's, also note the dimpled takedown pin & selector shaft.
Photo 9 of 68, XM16E1 R Buffer head.jpg, 98KB, 1009x711, 3062 Hits Other Sizes: Original
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