PRI 6.8mm SPC waffle magazines with push button floor plate are constructed of butt welded steel halves to create the best internal volume for the magazine. It uses a Magpul anti-tilt follower with spring and push button floor plate that allows for the magazine to be quickly disassembled for cleaning. The 5 round magazine is 3.7″ in length. The magazine sticks out the front side of mag well around an inch.