All of our followers are 'anti-tilt' which just means they have material that goes down the front and back of the follower so they resist rotation within the magazine tube. When the follower moves upward and engages the slide stop, it will make contact on the front of the follower. This action wants to push the front of the follower down but our followers resist this so they have a solid upwards push to lock back the slide. This means that when the magazine is empty and supposed to hold the slide stop up, it's hard to push it down to release the slide. If you have any rounds in the magazine there is no problem releasing the slide.