User Panel
User Panel
User Panel
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Posted: 12/17/2001 11:40:43 AM EDT
[#1]
One way to tell is to check for feed ramps on the inside of the upper, below the chamber. That`s a patented proprietory feature of the colt uppers. HTH
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Posted: 12/17/2001 3:44:20 PM EDT
[#2]
Do the feed ramps serve any purpose? (i.e. do they make it more reliable than, say, a Bushmaster M4gery?)
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Posted: 12/17/2001 4:27:56 PM EDT
[#3]
Hm, my ZM upper has the cuts too [img]http://www.stopstart.btinternet.co.uk/sm/gaga.gif[/img]
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Posted: 12/17/2001 9:29:27 PM EDT
[#4]
They're also stamped "4" or "M4" just above the cloverleaf where the gas tube goes into the upper....
hsld. |
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