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Gas tube question when adding a DD omega 9.0 Rail to a mid length
post November 4th 2009 5:09 PM
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I just got my upper and put together the lower last night.

I'm still not sure if I like the YHM LW FF tube. I would like to replace it with a Omega rail.

I have a question about the gas tube. if I get the 9.0 Rail, what do I do about the shorter gas tube? Seems like it may get pricey for me to replace the FF tube. I'll have to get some tools to unscrew the tube off. I'm all about DIY and replacing the ff tube doesn't look all that hard. If the gas tube needs to be replaced, maybe I should go for the 7.0 Rail instead. I'm just trying to see what the easiest/cheapest way to do it.
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post November 4th 2009 6:02 PM
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Your gas tube length is determined by where your gas port is drilled into the barrel. You can't just put a longer or shorter gas tube on a barrel that is already set up with a particular gas system (rifle, mid-length, or carbine length.) Well you could but it would involve welding the old port and drilling a new one, but to get the work done right, it would be cheaper to buy a new barrel.

If you are thinking of going with a longer handguard set-up then you would just put on a low profile gas block that the float tube will cover, or shave down your front sight base to make a low profile gas block. You can then bolt on a front sight in fornt of the handguard or get a rail mounted sight to replace the front sight.


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post November 4th 2009 6:09 PM
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What Doc said.


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post November 4th 2009 6:32 PM
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QUOTE (SSGN_Doc @ November 4th 2009 10:02 AM) *
Your gas tube length is determined by where your gas port is drilled into the barrel. You can't just put a longer or shorter gas tube on a barrel that is already set up with a particular gas system (rifle, mid-length, or carbine length.) Well you could but it would involve welding the old port and drilling a new one, but to get the work done right, it would be cheaper to buy a new barrel.

If you are thinking of going with a longer handguard set-up then you would just put on a low profile gas block that the float tube will cover, or shave down your front sight base to make a low profile gas block. You can then bolt on a front sight in fornt of the handguard or get a rail mounted sight to replace the front sight.


Ahhhh...... gotcha. that makes sense! Learning something new everyday. This is my first AR, so i'm still learning about all the various parts.

I dont want to do any mods to the gas block or barrel. I'll have to go with the 7.0 or find a rail with a slot for the front sight.
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post November 4th 2009 8:49 PM
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A DD Lite 9.5 will allow the use of the standard front sight base. Click here.



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post November 4th 2009 10:20 PM
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QUOTE (TigerStripe @ November 4th 2009 12:49 PM) *
A DD Lite 9.5 will allow the use of the standard front sight base. Click here.



TS


That one looks nice, but its out of my price range. I would need to get their special wrench as well to install it. I also like the looks of the Lite series better than the omega, in terms of the delta ring area.
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post November 4th 2009 10:59 PM
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I have a 12.0 Omega on one of my rifles with a carbine length gas system. I just used a YHM lo profile gas block and put it under the rails. You can see it in my sig. The tan one.


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