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Posted: 3/30/2012 8:54:11 AM EDT
If i have a 16" carbine 300 blk barrel
Can i cut it to say 12" without gas port work or do you think
i will need to open it so subs will function
Link Posted: 3/30/2012 9:06:40 AM EDT
Typically whenever you MOVE the gas port fore or aft on the barrel you go bigger the further out it is. So I would assume you could try and leave it alone because your not changing that relationship. Worst case scenario you just tap out your FSB pins and work it open later.
Link Posted: 3/30/2012 9:07:49 AM EDT
Originally Posted By KingIX:
If i have a 16" carbine 300 blk barrel
Can i cut it to say 12" without gas port work or do you think
i will need to open it so subs will function


12" carbine gas will not likely work well for 300 BLK regardless of size of gas ports. You really need pistol gas for anything under 16". In fact, even many 16" barrels are pistol gas.
Link Posted: 3/30/2012 9:11:59 AM EDT
Originally Posted By Schroedum:
Typically whenever you MOVE the gas port fore or aft on the barrel you go bigger the further out it is. So I would assume you could try and leave it alone because your not changing that relationship. Worst case scenario you just tap out your FSB pins and work it open later.


This does not actually answer the OP's question because he is talking about keeping the same port location but shortening the barrel. The shorter the barrel, the shorter the time the gas system is pressurized, so you need to increase port size to make up for it. However, as I said above, 300 BLK does not like carbine gas below 16" regarldess of port size.
Link Posted: 3/30/2012 9:25:31 AM EDT
Well that answers my question...
i dont have the barrel but was able to get one at a really good price
I dont want less than 10.5 so am trying to make stuff work
Will continue the hunt
Link Posted: 3/31/2012 1:23:56 AM EDT
Originally Posted By QuietRiot11:
Originally Posted By KingIX:
If i have a 16" carbine 300 blk barrel
Can i cut it to say 12" without gas port work or do you think
i will need to open it so subs will function


12" carbine gas will not likely work well for 300 BLK regardless of size of gas ports. You really need pistol gas for anything under 16". In fact, even many 16" barrels are pistol gas.


+1 ^^^^
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