My mate has issues with his new Specna Arms gun...BB's were flying all over the place. Quality is questionable...so many allen key bolts everywhere on this gun were loose. Had to loctite them all.
Turns out the hop unit has crap casting and warped and the hop rubber is made of cheese. (Torn, has a hole in it & tearing up inside)
I'm sticking in a new rotary hop unit for him and telling him to go for a G&G toptech gun next, as they are solid performers.