Failure to eject/ bolt stuck

[A5BLASTER]

Ived tried two diffraction carriers. Both function just fine in 5.56 rifles.

Your gas port is either way small or your gas block is blocking most of the gas port.

You can still get air out like you did if the block is only covering part of the gas port.

Since you have a adjustable gas block do this. Back out the adjustment screws. Leave the block where it is at. Run some weed walker string down into the gas block and see if it goes throw the port and into the bore.

If it doesn't come out into the bore, the gas block is still covering the gas port some.

You have a gas issue.

Also look around the surface where the gas block is contacting the barrel. Look for carbon, you may have a very bad gas leak.

Is the end of the gas tube where it contacts the gas key getting dirty i.e. carboned up. If not you have a very bad gas leak at the gas block.

Best way too use air to check gas block position is too close the chamber with the bcg. Leave the gas block lose and remove the adjustment screw. Shoot air into the bore from the muzzle and move the gas block around until you get the most air coming out the adjustment screw hole you can.

Hope this helps sir.