Safety orange, plastic flag clearly indicates, either close up or at a distance that there is no ammunition in the chamber. Ideal for range and classroom safety when identifying that a weapon is clear is of utmost importance. Safe-Port cannot be placed in chamber if there is a round loaded, but can be used when a loaded magazine is in the rifle and will eject from the chamber when the bolt is charged. Safe-Port can be marked with serial numbers for ease of identification in storage. SPECS: Plastic, safety orange. Fits AR-15/M16 rifles.