I use these valves to fine tune supersonic loads, as well as shut them off for subsonic loads. Both rifles have 20" barrels 15=5.56 10=.308 with standard rifle length gas systems and are set up in a DMR style. I custom installed the valves with a end mill, and as you can see the AR-10's barrel has a keyway milled into it at 12' oclock. The barrel of the AR-10 has a bit of gerth behind the gas block.
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"Get down, shut up" Lieutenant DAN
Crush these communist's posing as americans with liberty, and let them taste their own blood, that pumps for the hammer and sickle.
Last edited by dick; 01-29-2011 at 01:02 AM.
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