Here's what's wrong with the OP's "MP5"
Red: Pivot point for the lower receiver is too high up.
Green: No markings for which mode the selector plate is engaged in. (Semi, Full Auto, Safety)
Here's what's wrong with the OP's "MP5"
Red: Pivot point for the lower receiver is too high up.
Green: No markings for which mode the selector plate is engaged in. (Semi, Full Auto, Safety)