Things I liked: This is an improved design that I really like. The original magazine was open at the bottom. You could see and feel the spring and dirt could easily enter the magazine even when in the grip. This one is closed at the bottom. The fit is perfect. I don't know why the original magazine was designed the way it was - this one is far superior. Delivery was fast - had my order in a matter a days. I'm always pleased with Pyramyd Air.