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Posted: 5/17/2005 6:40:12 PM EDT
| I'd like to swap out the Colt A2 upper I have on my 6520 with a A1/C7 upper. The barrel has the M4 extention and the A2 upper has true M4 cuts. The A1 upper has dremeled feedramp cuts for the standard barrel extention. Will I run into a feeding/reliability option by switching out these uppers? I prefer the A1 sights and unfortunately haven't been able to find any Colt M4 cut A1/C7 uppers. |
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It depends. Does the new barrel have M4 cute in it? If it doesnt you are more likely to have problems What is the dremel job like on the A1? If its a bad job you are more likely to have problems. Its better to have a M4 cut barrel and a standard receiver then the other way around. Pictures of both would help. You wont really know until you put them together and try it out. |
Barrel is Colt 6520 with M4 barrel extention. The A1 receiver had feedramps cut by CMMG. Upper arrives from Colt tomorrow so I should be able to compare the feedramp cuts. |
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