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Old September 22, 2010, 08:32 PM   #11
Join Date: August 8, 2008
Location: DFW, TX
Posts: 66
Keep in mind that you will also have to relocate the gas ports.
This is not true if you're cutting a 6920, which uses a carbine-length gas system, to 10.5" which would still use a carbine-length gas system. In order for it run reliably though, you may need to have the gas port diameter opened up.

ADCO charges $65 to have the barrel cut, threaded, and recrowned to your specs if the barrel is uninstalled from the upper. I believe they charge a bit extra if you send in a complete upper to have work done that requires disassembly. From what I've read over on, they get nothing but good reviews as well.

A link to their forum on

and a link to their website:

Last edited by superchi; September 22, 2010 at 08:42 PM.
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