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Posted: 4/3/2006 1:39:10 PM EDT
Does the gas tube have to be shortened if I reduce the barrel from 20in to 16in?
HELP!!!
Link Posted: 4/3/2006 2:39:05 PM EDT
No... Only if the FSB and/or gas port hole is relocated, then, you need a shorter tube...
Link Posted: 4/3/2006 3:11:56 PM EDT
Thank for the info it will come in handy. Just got my first ar 15 sense my ets from the army in 91.
Any advise on what flash surpressor I should be looking for?
Link Posted: 4/3/2006 3:32:23 PM EDT
Also how much if any will the loss of 4in from the barrel affect the accuracy of my ar?
Link Posted: 4/3/2006 3:40:09 PM EDT

Originally Posted By pilot7418:
Thank for the info it will come in handy. Just got my first ar 15 sense my ets from the army in 91.
Any advise on what flash surpressor I should be looking for?



I prefer the SE VORTEX flash hider, others prefer the Phantom...
Link Posted: 4/3/2006 3:41:56 PM EDT
[Last Edit: 4/3/2006 3:44:43 PM EDT by theshootersden]

Originally Posted By pilot7418:
Also how much if any will the loss of 4in from the barrel affect the accuracy of my ar?



Depending on the condition of the bore, accuracy loss shouldn't be that noticeable under 250 yards...
Link Posted: 4/3/2006 3:46:08 PM EDT
If you have your barrel cut down, you need to have the gas tube opened up. You might have cycling issues in the cold, as well. If you want a 16" barrel you really should just get a mid length.
Link Posted: 4/3/2006 3:58:34 PM EDT
Thanks again for the info it will come in very handy.( I now have plenty to think about ).
Link Posted: 4/3/2006 4:09:27 PM EDT

Originally Posted By Combat_Jack:
If you have your barrel cut down, you need to have the gas tube port opened up. You might have cycling issues in the cold, as well. If you want a 16" barrel you really should just get a mid length.

Link Posted: 4/6/2006 11:43:47 PM EDT
Link Posted: 4/7/2006 7:30:38 AM EDT
does manufacturer matter when it comes to gas tube?
colt vs rra vs armalite vs .......

it's tube and a roll pin which i assume are all dimensioned to milspec
RRA is like $10.50. compared to $27 for the colt, $17 for the armalite, etc etc

am i correct in assuming that all gas tubes from the big suppliers are created equal?
Link Posted: 4/7/2006 11:16:12 AM EDT

Originally Posted By theshootersden:

Originally Posted By Combat_Jack:
If you have your barrel cut down, you need to have the gas tube port opened up. You might have cycling issues in the cold, as well. If you want a 16" barrel you really should just get a mid length.



Brain fart

Damn, thats embarassing.
Link Posted: 4/7/2006 12:44:40 PM EDT

Originally Posted By pilot7418:
Does the gas tube have to be shortened if I reduce the barrel from 20in to 16in?
HELP!!!



No but the gas port may need to be opened up.
Link Posted: 4/7/2006 12:47:06 PM EDT

Originally Posted By hellbound:
does manufacturer matter when it comes to gas tube?



Yes it does, but not for most shooters.

If you shoot really really heavy (we're talking case per hour or full-auto) then I'd suggest a higher quality unit.

Cav-Arms had a photo of a lesser gas tube that litterally melted (but their handguards didn't melt).

Military (Colt) tubes have been run so the barrel bursts before they do.
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