I have a CA89 9mm mp5 clone new production from coharie arms the fit, finish, and welds are better than any clone i have seen. The new ones I guess have major improvments, but mine has a problem. The 30 round curved mag that came with the gun has a wobble moving forward and backward. maybe 3/4 inch wobble. when manually feeding the bullet will hit the edge of the chamber and if i move the mag around a bit it will adventually lock in place and chamber the round. I started thinking about possible soulutions. Do I need a HK curved mag, I did order one by the way still waiting for it to arrive. Is it the mag catch? Could it be the mag well? Do curved magazines wobble front to back that much? It seems as if i could push the magazine forward then i wouldn't have a problem chambering a round. How tight is it supposed to be? there is no play going left and right. Is the mag catch supposed to let it have a little wobble? (the 2 bumps on the back of the curved mag near the bottom of the mag well when inserted) these look different in size and placement one looks longer the other shorter but as i look on the internet i dont find anything related to my problem with loose curved mags in a HK sp89 or 94 clone causing feeding problems. I have asked for some help on another forum but it was short and simple send it back. I will unless i figure out the possible problems i want to know what causes this. Seems to me if the barrel had it's own feed ramp it would be a much more reliable gun. The ammo I have the most problem with is ranger T series JHP but curved mags are supposed to make feeding these more reliable. It still happens with FMJ I just dont have a bunch lying around. It happens when magazine has any amount of ammo. What causes a magazine to wobble?