Features of Classic Army CA5-A2 MP5A2 (MP001M)
- Flashlight Fore Grip with 6V Bulb
- 7mm Bearing Bushing Version 2 Gearbox
- High Quality Steel Gears, Gearbox Shell, and a Polycarb Piston
- New Design Hop Up System
- Movable Cocking Lever and Includes Remote Switch for Flashlight

Features of Classic Army CA5-A3 MP5A3 (MP002M)
- Flashlight Fore Grip with 6V Bulb
- 7mm Bearing Bushing Version 2 Gearbox
- High Quality Steel Gears, Gearbox Shell, and a Polycarb Piston
- New Design Hop Up System
- Movable Cocking Lever and with Retractable Stock 

Features of Classic Army CA5-SD2 MP5SD2 (MP003M)
- Metal Dummy Suppressor and Quick Dis-assembly Metal Body
- 7mm Bearing Bushing Version 2 Gearbox
- High Quality Steel Gears, Gearbox Shell, and a Polycarb Piston
- New Design Hop Up System
- Movable Cocking Lever and with Unique Serial Number

Features of Classic Army CA5-SD3 MP5SD3 (MP004M)
- Metal Dummy Suppressor and Quick Dis-assembly Metal Body
- 7mm Bearing Bushing Version 2 Gearbox
- High Quality Steel Gears, Gearbox Shell, and a Polycarb Piston
- New Design Hop Up System
- Movable Cocking Lever and with Uniqne Serial Number

Features of Classic Army CA5-A2  (MP005M)
- QD gearboxs and Quick Dis-assembly Metal Body
- 7mm Bearing Bushing Version 2 Gearbox
- High Quality Steel Gears, Gearbox Shell, and a Polycarb Piston
- New Design Hop Up System
- Movable Cocking Lever and with Unique Serial Number

Features of Classic Army CA5-A3 MP5A3 (MP006M)
- OD Spring Change System and Quick Dis-assembly Metal Body
- 7mm Bearing Bushing Version 2 Gearbox
- High Quality Steel Gears, Gearbox Shell, and a Polycarb Piston
- New Design Hop Up System
- Movable Cocking Lever and with Unique Serial Number

Features of Classic Army CA5-A4 MP5A4 (MP007M)
- OD Spring Change System and Quick Dis-assembly Metal Body
- 7mm Bearing Bushing Version 2 Gearbox
- High Quality Steel Gears, Gearbox Shell, and a Polycarb Piston
- New Design Hop Up System
- Movable Cocking Lever and with Unique Serial Number

Features of Classic Army CA5-A5 MP5A5 (MP008M)
- OD Spring Change System and Quick Dis-assembly Metal Body
- 7mm Bearing Bushing Version 2 Gearbox
- High Quality Steel Gears, Gearbox Shell, and a Polycarb Piston
- New Design Hop Up System
- Movable Cocking Lever and with Unique Serial Number