BinTac Zeus Tactical 58cal 16 inches Muzzle Velocity: .58 CAL 690Gr FPS700 740 FPE Air Tube Capacity:350CC Total Air Filling Pressure: 4500 PSI SHOTS PER FILL: 58 CAL 3Good Shots Barrel Length: 16'' Overall Length:30 Inches with Rear Stock BinTac Zeus Tactical 58cal 24 inches Muzzle Velocity: .58 CAL 690Gr  FPS770  950 FPE Air Tube Capacity:500CC Total Air Filling Pressure: 4500 PSI SHOTS PER FILL: 58 CAL 4 Good Shots Barrel Length:24'' Overall Length:38 Inches with Rear Stock BinTac Zeus Tactical 58cal 32 inches Muzzle Velocity: .58 CAL 690Gr  900FPS 1250FPE Air Tube Capacity:700CC Total Air Filling Pressure: 4500 PSI SHOTS PER FILL: 58 CAL 5 Good Shots Barrel Length:32'' Overall Length:36 Inches with Rear Stock BinTac Zeus Tactical 72cal 16 inches Muzzle Velocity: .72 CAL 550Gr FPS820 FPE850 Air Tube Capacity:3500CC Total Air Filling Pressure: 4500 PSI SHOTS PER FILL: 72 CAL 3+ Good Shots Barrel Length:16'' Overall Length:28 Inches with Rear Stock BinTac Zeus Tactical 72cal 24 inches Muzzle Velocity: .72 CAL 860Gr FPS820  FPE1200 Air Tube Capacity:500CC Total Air Filling Pressure: 4500 PSI SHOTS PER FILL: 72 CAL 3+ Good Shots Barrel Length:24'' Overall Length:38 Inches with Rear Stock BinTac Zeus Tactical 72cal 32 inches Muzzle Velocity: .72 CAL 1092Gr FPS780 FPE1500 Air Tube Capacity:700CC Total Air Filling Pressure: 4500 PSI SHOTS PER FILL: 72CAL 4Good Shots Barrel Length:32'' Overall Length:48 Inches with Rear Stock SHOTS PER FILL: 72 CAL 3+ Good Shots