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Posted: 8/17/2011 10:35:53 AM EDT
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im getting all kinds of stories on differences between the A3 and A4 uppers
for the most part the most popular answer is the A4 has different feed ramps and thats the only difference.. can anyone clarify ? |
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Quoted:
Quoted:
A3 is an A2, A4 is a flat top. Posted Via AR15.Com Mobile A3 is a flat top as well. No. The commercial designation for a flat top receiver is A3. The military designation for a full auto M16A2 is A3. In my opinion, military designations trump commercial designations. So, in reality, a flat top receiver with M4 feed ramps would be called an M4 receiver, while a flat top receiver without M4 feed ramps would be called an A4 receiver. |
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Colt A3
A3 looks like a flat top. Edit: I know of the older M16A3 with fixed carry handles. Considering we are in the AR15 forum, i will go with the link above. from "So You Want to Buy an AR-15 - Features to Consider" The “A3” variant is called the “flat top” and is now probably the most common and most versatile.
also: from http://www.biggerhammer.net/ar15/uppers/ Inroduced by the military in the A3 configuration with removable handle these uppers allow the attachment of weaver style rings directly to the receiver. Several other makers offer these in a "high rise" style that extends the base up even further to allow for a higher scope positioning.
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