I am selling my AK74 as I have gone back to 1 replica and don't have time to repair this replica.
It shoots normally when you hold the replica upside down, I suspect there is something wrong with the hop-up unit itself.
It contains a Perun mosfet that is fully adjustable. Worked perfectly for the hopup problem with a lot of range. Comes with 4 magazines and Chicom chest rig.