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Posted: 3/28/2017 11:23:00 PM EDT
Question:

Many here suggest an adjustable gas block for a 308 build. What is not clear to me is if such a device can INCREASE the amount of gas over and above a plain gas tube. Is this possible, or does it merely allow for decreases in gas to avoid over gassing?
Link Posted: 3/28/2017 11:49:02 PM EDT
[#1]
In the scenario you describe it can only decrease gas flow.  You'd have to open the barrel gas port to increase flow.  On my two AR10 .308's, only my 16" setup showed a slight improvement using an adjustable gas block to ease recoil a bit on the mid-length system in that rifle.  My 20" with rifle gas is just fine with a plain block.
Link Posted: 3/29/2017 12:49:16 AM EDT
[#2]
By itself, it cannot increase gas flow. But an adjustable block gives the option of then opening the gas port larger, and using the adjustability to deliver the amount of gas desired or required.
Link Posted: 3/29/2017 3:20:30 AM EDT
[#3]
No

The gas port is where the first flow path is located and controlled.

An adjustable block can't open that any larger.
Link Posted: 3/29/2017 11:54:02 AM EDT
[#4]
There's a saying in Oklahoma that if you want gas you have to,"Drill baby drill!!"  Same thing on any AR. Nothing above that port can increase the flow.

Greg
Link Posted: 3/29/2017 12:52:14 PM EDT
[#5]
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Quoted:
There's a saying in Oklahoma that if you want gas you have to,"Drill baby drill!!"  Same thing on any AR. Nothing above that port can increase the flow.

Greg
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True! Except they seem to be having more earthquakes out there recently......Might be fun with a 308!
Link Posted: 3/29/2017 1:18:03 PM EDT
[#6]
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Quoted:


True! Except they seem to be having more earthquakes out there recently......Might be fun with a 308!
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Yep but who gives a frack.... (VBG)

Greg
Link Posted: 3/29/2017 1:33:02 PM EDT
[#7]
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Quoted:
Yep but who gives a frack.... (VBG)

Greg
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Quoted:
Quoted:


True! Except they seem to be having more earthquakes out there recently......Might be fun with a 308!
Yep but who gives a frack.... (VBG)

Greg
Hahaha! Good one.
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