The Outlaw Gang Airsoft post their endurance review of the King Arms Thompson 1928 Tommy Gun... "Review of the King Arms Thompson 1928 (KA-AG-65) after 2 years of usage (please keep in mind this is a subjective appreciation of the replica gun). Full markings are laser engraved on the receiver. It is metal receiver with plastic lower frame, handguard, grip and stock. The rear sight is adjustable as user’s preference. The stock is capable to store a 2000mAh 8.4V large type battery. Package comes with a 450 rounds drum magazine.

Official description from King Arms:

• Name M1928 Chicago Ultra Grade
• Code KA-AG-65
• Weight w/o magazine 2960 g
• Overall length 860 mm
• Inner barrel length 315 mm
• Main material Zinc Alloy; ABS
• Color Black; Wood Pattern
• Caliber 6 mm BBs
• Method of operation Electric Power
• Battery type 2000mAh 8.4V Large Type Battery
• Fire mode Safe / Single / Full-auto
• Gearbox Ver. 6 with 9 mm Bushing
• Muzzle velocity 380-410 fps"