AR Extraction Issue

If you have the pinned on gas block it is most likely aligned. On my gas blocks that have set screws I scribe lines on the barrel and on the block to make sure I get proper alignment. You can be off to some degree and still get proper function. Dont stick a pipe cleaner down there , you wont make the 90 degree bend. Spray a can of brake cleaner and make sure you dont loose the little red straw.

adelbridge said:

If you have the pinned on gas block it is most likely aligned. On my gas blocks that have set screws I scribe lines on the barrel and on the block to make sure I get proper alignment. You can be off to some degree and still get proper function. Dont stick a pipe cleaner down there , you wont make the 90 degree bend. Spray a can of brake cleaner and make sure you dont loose the little red straw.

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Or take a piece of empty brass fired in that gun, put it in the chamber plug up the muzzle with your finger and spray some compressed air into the gas tube at the chamber....that is how I made sure my gas system was good to go when I built my rig. The compressed air should shoot the empty round out of the chamber.

Don't put things in the gas tube....not a pipe cleaner, nothing solid, nothing liquid.
If the gas tube has a problem, replace it as intended.

There are ways to check the tube without sticking things in it.
One way is to hold a finger over the rear end of the chamber to block it, then blow down the barrel.
If the tube is open you can tell.

OhioChief said:

Thanks. Gas tube is clear. free flow of air. took the bolt apart and it looks fine. not sure what else to do.

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Preform some tests on the bolt to determine the integrity of the gas rings...


pull the bolt out of the carrier (not actually pulled out...keep everything assembled and pull the bolt out to its fully extended position.

Now set the bolt carrier group down on a table resting on the bolt...it should not push the bolt back into the carrier.

Alternately, you can push the bolt all the way in, and hold the bolt carrier group by the bolt and with the carrier facing down, it should not pull the bolt out of the carrier.

If your gas rings are REALLY gone, then you can just flip the bolt in and out of the carrier with a flick of the wrist

Check the gas key on the bolt carrier, look for loose or leaky fit, also check for a possible foreign material blockage in the key itself.

Also, with the bolt removed from the carrier, insert the carrier in the upper & observe how the key & gas tube mate. Make sure nothing is bent or misaligned.

Nick