I just purchased a new Glock 30SF and I noticed that when I insert the two mags that came with it, I am not able to release the slide. I also have two new mags that I purchased and there seems to be differences between them (followers, & body type). At first I thought it was the gun itself, when I insert the two mags that were purchased, I am able to release the slide with the release lever by itself, and also by sliding the slide to the rear most position, and pushing down on the release lever. Any suggestions with the mags? Now about the gun. As stated, it is brand new. Purchased today, and the test shell casing was dated/fired last week in Georgia. Comparing it to my Glock 22 RTF2 it's troublesome when breaking it down, When I finally was able to get the slide to move forward. I had to add force to push it off the frame. The double recoil spring/rod appears to be strong (metal?) but stiff. I had a hard time getting it back in position on the slide/barrel. When I break down the 22, slide the lock down, the slide slides off forward with ease. Is this normal with the 30? Does it need breaking in? Possible defect?