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Archived [ARCHIVED THREAD] - 20" Colt barrel in a Colt M4 Upper?
Posted: 9/14/2005 11:02:50 AM EDT
The feed ramps seem to match pretty well. The barrel is a 2003 barrel and seems to have feed ramps between an M4 and an older standard barrel. Very little overlap, if any, of the extension ramps to the receiver ramps. If anything all it seems I need to do is smooth the joint of the parts. Any feedback pro or con?

Link Posted: 9/14/2005 11:29:56 AM EDT
[#1]
Well, hand feeding 10 rounds was successful. No problems.

Archived [ARCHIVED THREAD] - 20" Colt barrel in a Colt M4 Upper?
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