So I spent a few hours yesterday dialing in my hop (got the Laylax hop arm, everything else stock) on my MTR-16. It was shooting .36s fine.
Then today at a skirmish in typical airsoft fashion it decided to start playing up - it looked and sounded like it was firing correctly, but only 1 in 5 shots would actually come out of the barrel. It seemed that about 4 or 5 bbs would get stuck in the barrel before they all rolled out.
I tried turning the hop off all the way - didn’t change anything. Tried putting it back on - again no difference.
Also tried some different gas (144a, green, red) and the issue persisted with them all.
Any idea what has gone wrong? The barrel is clear and the hop rubber looks intact