This is currently our LARGEST Mobile Bullet Trap option all pistol calibers and rifle rounds up to 9 mm. It is mobile, offers a quick, safe setup and deployment. It is made from steel for exceptional durability, and includes a removable steel back-plate and also a rubber face made of 1″ thick ballistic rubber of an exceptional quality, self-healing. This is the ONLY trap with removable back-plate that can be replaced or upgraded. ABSOLUTELY by far the safest and easy to use bullet trap as long as it is used within the specified calibers.