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Qlong · March 21st, 2012, 20:10

Well, A3/A4 are the same, just different marketing terms, vendors selling flat-top uppers frequently get A3 mixed up with A4 so you often see flat-top ARs called A3s, these are terms strictly for stripped uppers.

Military designations of the M16 rifle would be a bit different:
A3: Fixed carry handle. Safe/Semi/Auto fire control group.
A4: Detachable carry handle/flat-top receiver. Safe/Semi/Burst fire control group.

The CQD mount would not match that profile in the picture, as it the loops are slightly bent back. There are so many variations of that type of loop, I only named 2.

March 21st, 2012, 20:10	#11
Qlong Division Trader rating Join Date: Jun 2007 Location: Scarborough, Ontario	Well, A3/A4 are the same, just different marketing terms, vendors selling flat-top uppers frequently get A3 mixed up with A4 so you often see flat-top ARs called A3s, these are terms strictly for stripped uppers. Military designations of the M16 rifle would be a bit different: A3: Fixed carry handle. Safe/Semi/Auto fire control group. A4: Detachable carry handle/flat-top receiver. Safe/Semi/Burst fire control group. The CQD mount would not match that profile in the picture, as it the loops are slightly bent back. There are so many variations of that type of loop, I only named 2. Last edited by Qlong; March 21st, 2012 at 20:17..