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Old 07-02-2011, 09:25 PM   #11
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Is it the integral carry handle upper that makes it an A1? What is a flattop upper, then?

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Old 07-02-2011, 10:35 PM   #12
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Originally Posted by CHLChris View Post
Is it the integral carry handle upper that makes it an A1? What is a flattop upper, then?
Not really since the plain ol' M16, the M16A1, the M16A2, the M16A3, a few early M4s and the ArmaLite/Colt AR-15 (pre-M16) all had integrated carry handles. Only the M16A4 and current M4/M4A1s are flat tops. Of the commercial versions, usually you hear A3 and A4 for flat top.

An M16A1 had a few upgrades over the M16 like the chromed chamber/barrel, forward assist, etc.
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