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Old November 11, 2012, 12:46 PM   #18
Senior Member
Join Date: November 24, 2010
Location: Spring, TX
Posts: 1,541
To me the only thing that the gas system affects cyclic rate and recoil impulse. I could get the same sight radius out of a 16" barreled gun via handguard mounted BUIS as a 20" barreled gun. Even rifle length handguards don't go a full 20".
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