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Posted: 7/1/2009 3:00:10 PM EDT
| Im using a DPMS 7" barrel and I'm short stroking. I'm looking for some recommendations on opening up the size of the gas port on the barrel. Thanks , Dan |
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Before you take a drill bit to the barrel there are several things you need to check first.
Make sure the gas block is in the proper position and the hole is not being blocked. Usually the rear face of the gas block needs to be 1/32 inch off the shoulder if you are not using the standard A2 type handguards. If you are using a free float tube and the gas block is slam against the shoulder your gas port in the block may be blocking part of the gas port in the barrel. Make sure the gas block is not leaking or that the gas tube is leaking in the gas block. Look for tell-tail signs of gas venting where it shouldn't be. Check your gas tube to make sure it is not damaged or restricted anywhere. Check your carrier key to make sure it is tight and not leaking. Reinstall and restake if necessary. The last thing you want to do is start drilling first. That's a good way to ruin the barrel so start with the free fixes first. My kitty-cat upper runs just fine so I think DPMS has the gas port the correct size in the barrel. IMO there is another cause other than the gas port size. |
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How on earth is a heavier buffer tube going to do anything? If you meant a heavier buffer then that would be counter to what he wants to accomplish. A heavier buffer would offer more resistance and slow the carrier down, not speed it up.
Just for kicks and giggles, what buffer tube and buffer are you running on the pistol? If by chance you have that screwed up it could cause short stroking, such as using a rifle buffer in a CAR tube or an excessively heavy buffer along with weak ammo such as Wolf. |
correct. should have said try a different tube.
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