Thread: Chamber/action cleaning

so... this topic is relevant enough for me to post here. My AR15 is having some ... odd issues. I tried taking it out tonight only to find the bcg became jammed at about 90% of the way closed. Had to leverage it open with the upper taken off. Seemed weird so I took it home and had a fiddle round and couldn't see any obvious issues. I took the bcg right out and tried putting a bullet into the chamber to see if the problem was there and behold... the bullet becomes jammed in the chamber when it's about 50% of the way in. The barrel has had ~20 rounds through it and isn't particularly dirty... it's like the bullets have grown or the barrel has shrunk! Any ideas? This just seems weird. Happens across two different brands of ammo both of which have worked fine in the past. Nothing has changed on the gun since I last fired it... has just been in the safe

This should help the situation.

Originally Posted by clavulanate

so... this topic is relevant enough for me to post here. My AR15 is having some ... odd issues. I tried taking it out tonight only to find the bcg became jammed at about 90% of the way closed. Had to leverage it open with the upper taken off. Seemed weird so I took it home and had a fiddle round and couldn't see any obvious issues. I took the bcg right out and tried putting a bullet into the chamber to see if the problem was there and behold... the bullet becomes jammed in the chamber when it's about 50% of the way in. The barrel has had ~20 rounds through it and isn't particularly dirty... it's like the bullets have grown or the barrel has shrunk! Any ideas? This just seems weird. Happens across two different brands of ammo both of which have worked fine in the past. Nothing has changed on the gun since I last fired it... has just been in the safe

So to confirm, gun worked fine previously, but only recently has the issue?