PlaSSo does an unboxing and review of the ATM SLR B15 Gel Blaster. He lists the gun's key features, including its recoil, automatic pre-feeding of ammunition, and stylish design. He also covers the accessories that come with the gun, such as an 11.1V battery, a charger, a sight, and a bag of water beads. He notes its fast response time and strong recoil, and even compares it to an F-1 model. Also includeded is a disassembly and modification for use with airsoft BB pellets by replacing the inner barrel and modifying a magazine.