Posted: 8/16/2001 4:06:11 PM EDT
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I am considering building a short barrel upper for my 15. Basically I want the barrel to be around 10.25" OAL. What size gas port port should I use and secondly what mods do I need to make to the upper. I intend to use a spare colt 1 in 7 bbl I have in the workshop. Thanks for your time Philsby |