arthurgonz 0 Posted August 4, 2010 Report Share Posted August 4, 2010 i have a 3 port gas hole and a 21 inch barrel and i am planning to cut the barrel to a 17 or 18 inch to still make it legal. any modification on the gas ports? Quote Link to post Share on other sites
hobbyshooter 59 Posted August 5, 2010 Report Share Posted August 5, 2010 17" is federally illegal. Quote Link to post Share on other sites
billyjoebob 10 Posted August 5, 2010 Report Share Posted August 5, 2010 (edited) 17" is federally illegal. What he said. Can't go less than 18". There's a thread floating around here about cutting a barrel down and permanently attaching a muzzle break to bring the overall length up to 18" (i.e. a 15" barrel + a 3" muzzle break). General consensus is you'll have to open up the ports a bit to compensate for the reduced dwell time. Edited August 5, 2010 by billyjoebob Quote Link to post Share on other sites
vinnivanhood 17 Posted August 5, 2010 Report Share Posted August 5, 2010 one of many threads but I started this one so its my favorite Quote Link to post Share on other sites
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