Larue Stealth Barrel Gas Port Size

[rlsmith1]

Anyone know what the gas port size is on a 16" Larue Stealth 556 barrel? I don't have the pins to measure the size and I'm hoping to chop this one down to 13.9" and pin a Dead Air flash hider. Thanks in advance

 

[HadesPrecision]

Anyone know what the gas port size is on a 16" Larue Stealth 556 barrel? I don't have the pins to measure the size and I'm hoping to chop this one down to 13.9" and pin a Dead Air flash hider. Thanks in advance

Mine measures at .082" but it's also about 11 years old so I don't know if they've changed their spec since then.

 

[rlsmith1]

Right on, thanks. Sounds a little large even for a 13.9". Mine is probably 3 years old, is there any other way to measure these ports accurately?

 

[HadesPrecision]

Right on, thanks. Sounds a little large even for a 13.9". Mine is probably 3 years old, is there any other way to measure these ports accurately?

Ya, it always seem a little over gassed. But it shot great right up until it didn't anymore and was worn out. You can use a drill index in place of gauge pins to get a close measurement too.

 

[TheOE800]

Stealth barrels have always been over gassed.

 

[ormandj]

Right on, thanks. Sounds a little large even for a 13.9". Mine is probably 3 years old, is there any other way to measure these ports accurately?

Pin gauges are the only correct way for something of this size. Preferably Z or X, but ZZ will do. Grab a set, 0.061"-0.250" is pretty common (minus is more fitting for this application) and a holder (go/nogo are useful for other things in the future). Find which will fit without pressure, and which will not, then you know the size is somewhere above the one that fits and below the one that does not. For a set like the above, within a thousandth, which is plenty of precision for something like this. A cheap set on Amazon of minus ZZ grade will run you ~$70-$80.

 

[Molon]

Stealth barrels have always been over gassed.

16" Predatar barrels as well. The pic below is from one such barrel . . .

....

 

[TheOE800]

Hogged out.

 

[rlsmith1]

Thanks guys! I'll be sending it off to get chopped to 13.9" this week. May still run an AGB and/or run a heavy buffer

 

[natehansen66]

Mine is .082 as well. Running a black river tactical gas block which is reduced to .07 iirc. Runs great now!

 

[rlsmith1]

Right on, I measured with a caliper (not super precise I know) and got .083 to .085 so I'd say that's a ballpark number. Regardless, I'm sending it to be chopped to 13.9" and it will have a seekins adjustable gas block on it for the rest of its life