Mid-length ejection angle

[prepare]

Remove the handgaurd and visually check that the gas block is properly aligned and secured.

An inexpensive bore scope would allow you to see the gas port and gas block alignment.

[Wow]

I did what you suggested. I also ordered a cheap bore scope. Lets see how that goes.

Here is an image album of the upper/gasblock/barrel. It looks good to me but I don't know much tbh. Do you see any issues with alignment, etc?

https://imgur.com/a/bcnJ3zX

[vicious_cb]

I did what you suggested. I also ordered a cheap bore scope. Lets see how that goes.

Here is an image album of the upper/gasblock/barrel. It looks good to me but I don't know much tbh. Do you see any issues with alignment, etc?

https://imgur.com/a/bcnJ3zX

Stop wasting time and money. Send that s**t back and tell them its short stroking, make them figure it out and fix it on their dime.

[Wow]

If my gunsmith is too dumb to build it right the first time I don't want to send it back to the same guy.

[prepare]

I did what you suggested. I also ordered a cheap bore scope. Lets see how that goes.

Here is an image album of the upper/gasblock/barrel. It looks good to me but I don't know much tbh. Do you see any issues with alignment, etc?

https://imgur.com/a/bcnJ3zX

Visually it looks good. Plus the GB is pinned so providing its aligned properly it hasn’t moved.

[georgeib]

I did what you suggested. I also ordered a cheap bore scope. Lets see how that goes.

Here is an image album of the upper/gasblock/barrel. It looks good to me but I don't know much tbh. Do you see any issues with alignment, etc?

https://imgur.com/a/bcnJ3zX

Looks well assembled. Gas block seems to be aligned correctly too. I would move to an H1 or H0 buffer, and call it a day.

[Clint]

Pictures are helpful.


The gas block looks like it might be a bit too far forward.

The gap between the barrel shoulder and the block should normally be around .025" and through the internet, this one looks like double that.


There's also fairly significant gas leak residue around the gas tube bore out both the front and back of the gas block.

Most likely due to a loose bore in the gas block or possibly an undersized gas tube OD.

[n8vmind]

I was wondering for those of you who have 16" 5.56 Ar15 with midlength gas systems, at what angle does your ar eject? I have one at 3 o'clock and one at 4 o'clock. I now wish I'd gone with carbine length gas just for the increased reliability.

At what o'clock does your middy eject? I am feeling underpowered at 4.

I went the other way, first AR was carbine length, 2nd AR was mid length. Both 16" with H1 buffer.. now I almost exclusively shoot the mid length.

Sent from my Pixel 3a using Tapatalk

[lysander]

Picture #12, the gas port is set forward about 0.045" to 0.050". (You can get a very good estimate from the under cut in the step. It is about 0.040" wide, and you can see all of it.)

That is enough to cover the gas port if the gas block is designed to work WITHOUT a handguard cap.

Measure from the back of the gas block to the center of the rear set screw hole, if it is 0.300", there's your problem.

[Wow]

Here is an image of those measurements. I think it is closer to 0.250". I think I gave you the right value.

https://i.imgur.com/TbYHQeC.png