I just got my KSC USP full sized, ive discovered a problem with the magazine not feeding correctly.
Basicly, the slide jams half open when it returns after a shot because the B's on the right hand side of the double feed mag do not feed upwards into the barrel.
The BB simply wont shift, and can only be removed with a pair of pliers.
After removing the jammed bb, i can fire one shot from the left stack before the feed jams again.
I think its an issue with the feedlips on the magazine, but i cannot be certain.
Pictures as follows:
