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Posted: 5/2/2002 7:05:42 PM EDT
On factory preban Sp1's specifically..
Link Posted: 5/2/2002 9:26:34 PM EDT
Don't know about the SP-1's, but I think the M16A1 came out in 1966, which had the full cage flash hider.
Link Posted: 5/17/2002 6:14:32 PM EDT
That is classified.
Link Posted: 5/19/2002 3:03:40 PM EDT
I was in VN from July 1969 to Sept. 1970. We started out with the 3 prong and switched sometime during my time there. Can't remember when exactly.
Link Posted: 5/19/2002 3:50:15 PM EDT
IIRC because the open prongs of the flash hider would get catch on brush and snag all kinds of stuff. The closed birdcage style elminated that.
Link Posted: 5/20/2002 12:30:23 PM EDT
I am not sure either, but mine was made in 1972 and it has the birdcage style.
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