AR gas tube for .875 gas block

[Vodak]

Anyone aware of a gas tube that's bent to fit the larger .875 gas blocks? I've got a rifle that runs the larger block. It was a pain in the nuts to get the tube bent up to fit without putting pressure on the bolt carrier. I'm going to be changing some things around, and would like to just buy a correctly bent tube to install while I'm at it.

 

[BCX]

Just bought 2 Lantac gas tubes, fit perfect. No bending required.

 

[Travis_260Rem]

JP has the size, but the price might be high. Tubes are bent and might be extra. Item # JPGS-10D

 

[Black max]

Isn't the height over bore on gas tubes all the same regardless of the diameter of block?

 

[hlee]

Isn't the height over bore on gas tubes all the same regardless of the diameter of block?

You’d think so, but you’d be wrong. I have a 0.936 SLR block with a straight tube. The standard bent tube didn’t fit for shit. I believe the tube is from performance reflex.

 

[2aBaC̶a̶]

Never noticed. I have a .936 on my 6.5cm gasser bought the barrel, block, tube, all from the same place so it just worked.

 

[Vodak]

Isn't the height over bore on gas tubes all the same regardless of the diameter of block?

Unfortunately no, they are not. The port on my .875" is roughly .040" higher than a .750" gas block. It's not a lot, but it's enough that the tube is misaligned going into the gas key to the point where you can see the tube flex as it enters the key. I was able to bend it by hand to the point where I feel its acceptable, but not perfect.

In case any of you are unaware that pressure can hurt accuracy, and wear on the tube or key can reduce reliability as well.

I'll take a look at the places mentioned, thanks guys.