Confirm your rifle has no magazine installed, and cannot fire by locking the bolt back on your rifle with our Safety Magazine. Bright orange material serves as a quick visual indicator, and hollow construction shows no rounds could be inside. Locks in like a standard AICS magazine, protrusion prevents bolt from closing. Will only fit into the rifle if the bolt is open. Tired of inserting a chamber flag or worse not being able to find one? Here is your answer.