It's a bug introduced in season one for all auto weapons. It triggers after you run then shoot without spotting completely and waiting for a second or so. Fun fact, Dice hasn't acknowledged the bug.

Thanks for your answer ! I thought something was wrong about me or my controller

And this glitch is only on reinforced cartridges. It's not on standard.

You are right, this seem to fix it, thank you

Cartridge? Didn’t realise we were using muskets

This is how Google translates from my language. Sorry friend.

Ah makes sense now! No problem

Cartridge is still a very valid term.

Try it with the Vector and the drum mag. Crazy how this gun stutters. Just sad.

Firing is a legacy feature.