I picked up a new gen 3 on Friday. It is the first Glock I have bought in a while that I like. I noticed that the mag does not drop freely when the pistol is tilted to one side. The mag will drop when the mag is going strait down but will often not if I try to sling it to the side like I do with all my others pistols. The mag release spring seems weak. This seems weird since the gun is new. I have owned 4 Glocks. Three gen 3's and 1 gen 4 and I don't remember anything like this happening in the past. Is this something I need to send it back for or can I do something to fix it myself?