KWA MP9A3 - Wobbly upper reciever

[Coski]

Hey all,

I just recieved a KWA MP9A3, and whilst Its very fun to shoot, Im not so happy with the external quality.

To the rear of the gun, the upper and lower reciever dont quite meet, and there is a bit of wobble in the upper reciever. Is this a common thing with these models? From reveiws Ive read/watched, I get the impression that the external quality is usually excellent, and there is never any mention of a problem similiar to this, so Im led to believe it isnt..