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12/17/2013 10:53:51 AM EDT
Hi and Happy Holidays!
I purchased a Troy steel gas block.
My question is the gas tube hole is open
in the front of the gas Block?

I called Troy they said the roll pin stops
Passing gas out the front?

I have never seen a gasblock that the tube
hole did not terminate in the block.

I have a JP ADJ. GB on another rifle and another
w standard front sight.

Won't this opening be a problem like
With dirt getting in the open gas tube on a bad day....?
Thanx All!

12/17/2013 10:55:52 AM EDT
[#1]
http://www.midwayusa.com/product/294696/troy-industries-low-profile-gas-block-ar-15-lr-308-bull-barrel-936-inside-diameter-steel-matte

I am building with a DPMS mini sass barrel in 5.56

12/17/2013 11:01:05 AM EDT
[#2]
I don't see why it would be a problem.  The YHM that I have is the same way as well.  If you're concerned, maybe plug it with JB weld once you get the tube in there.
12/17/2013 11:50:10 AM EDT
[#3]
Doesn't the tube that goes in to the gas block have a sealed end on it? That should prevent anything that you wouldn't want getting in the gas tube from getting in to it. If the tube wasn't sealed at the end, I don't know what would prevent the pressure from just blowing out the front of the gun rather than moving the bcg backwards.
12/17/2013 12:39:05 PM EDT
[#4]
Mike, that's what I thought....
Troy Industries makes good parts, I love my Troy BUIS. And the push button Sling attachment that fits over the castle nut.

I even called and spoke with the Tech people at Troy,
he said the retaining roll pin stops the gas from exiting the front.

Thanks to All for making me feel settled.

I had my Barrel Cerakoted and the 1st gas block was a Brownells and it did not fit, even after sanding inside.

I will have to sand off the Cerakote top Layer to fit any gas block,
cause this one stops halfway into place, just pushing the GB to that point got it stuck.
 ( I did have the set screws taken out so that's not it)
Took a mallet to knock it free.

Maybe the Cerakote is thicker then normal?
12/17/2013 1:10:38 PM EDT
[#5]
My gas tube is plugged and the roll pin goes through the plug to tie everything together.  The hole through the gas block is a non-issue.
12/17/2013 1:28:39 PM EDT
[#6]
gas tubes are plugged on the muzzle end.  Matter it does not if the gas block is open or not.  
12/17/2013 2:46:21 PM EDT
[#7]
THIS
Doesn't mean a thing. I have several that are open on the front end. Including a couple of adjustable ones. The gas tube end is solid, and the roll pin keeps it in place.
12/17/2013 4:30:58 PM EDT
[#8]
Thank You All!

HAPPY HOLIDAYS
AR Sponsor