rifle length gas on 18.5" .308 barrel

[s2k1]

I'm about to order my .308 barrel from Fulton Armory.  It's 18.5", but rifle length gas.  I was considering mid-length gas with an adjustable gas block so that I would have plenty of "gas" to play with.  Is the .308 platform generally overgassed?  Will I still have enough gas to tune?  Thanks!

[Robocop1051]

Adjusting gas should only be required if you're running a suppressor. The 18.5" with rifle gas is absolutely fine. FA used to make a 16" rifle length. My 17" has a rifle length. As long as the gas hole is wide enough, it'll cycle.

I guess the short answer you were looking for is "yes, it is over gassed" <lmao>

[washguy]

I'm about to order my .308 barrel from Fulton Armory.  It's 18.5", but rifle length gas.  I was considering mid-length gas with an adjustable gas block so that I would have plenty of "gas" to play with.  Is the .308 platform generally overgassed?  Will I still have enough gas to tune?  Thanks!

Hi S2    me...im partial to middy length gas systems...never needed an adj gas block....thing is i dont like my gas blocks exposed...just my own deal. with my middy system my choices for the handguard seems a lot better....every one ive built is pretty much a clone of the first one...the middy has never let me down...yep the brass flys,but never a ftf or fte.....when I wanna tune a lil for recoil...I go for the other end....buffer/buffer spring <thumbsup>  Wash

[s2k1]

Agreed on not exposing the gas block.  I'm using a 13.8" Troy TRX-308, which should just cover the gas block.  At least that's what my research tells me.  Rifle length gas tube is approx 13".  Standard Rifle lenght handguard is 12".  My TRX-308 is 13.8".  That should cover my gas block, right?

[98Z5V]

I'm about to order my .308 barrel from Fulton Armory.  It's 18.5", but rifle length gas.

Runs great - I have that barrel.  Don't do midlength gas on an 18.5" .308 AR.

Troy MRF-308, 13.8" rail.

[s2k1]

Nice!  How accurate is the barrel, and do you use an adjustable gas block?

[98Z5V]

Using a PRI .936 lo-profile gas block.  Non-adjustable.  It's a damn great barrel.  I'll try to find some pics of targets (they're all posted here, at any rate, somewhere).

EDIT - Details, and initial target results, are in this thread:

http://308ar.com/forum/dpms-lr-308-general-technical-discussion/lr308-self-build/msg616/#msg616