Shot the Sig P938 yesterday with 7 round pinkie extension magazines. It was shooting fine but had the magazine drop several times when shooting it with a two handed grip. I must be hitting the magazine release button so I gripped it lower than I normally would and the problem stopped. The magazine release does not have much tension on it, not like a full size 1911. I removed the magazine release button and stretched the release spring about a 1/4 inch longer and it seems a little better.