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KWA VM4A1 AEG 2.5 (adjustable FPS; modular upper; cutoff) Black

KWAVM4A1 / 104-01301




KWA's VM4A1 AEG latest take on the time tested M4A1 platform. This new AEG boasts the new Variable Performance System as well as KWA's 2.5 gearbox upgrade, making it a rock-solid choice for newcomers to the sport or long-time veterans looking for a dependable performer for all types of play styles. 

The key new feature of the VM4A1 is the Variable Performance System (VPS). The VPS enables the user to adjust the FPS of the AEG through the stock tube via an included tool, allowing for customizable performance. Refinements in the 2.5 Gearbox include new high-speed gears, 9mm bearings, improved high torque motor, and KWA's switch life extender for long life using high powered batteries. A rotary hop-up unit and 6.05 barrel are included as standard. Externally the VM4A1 sports a full metal receiver set and PTS pistol grip, and is rear wired into the 6 position stock with room for most nunchuck style batteries. All these features combine to make classic even better and give any player solid and dependable performance on the field.  


  • Variable Performance System: fully adjustable FPS through stock with provided quick change tool. Adjusts from 390 to 440 FPS
  • Full metal one-piece upper receiver, metal lower receiver, barrel assembly, metal buffer tube
  • V2.5 custom gearbox with upgraded high-speed gear set and an improved high-torque motor
  • Integrated switch life extender to prevent contacts from burning out
  • Rotary style hop-up
  • PTS Enhanced Polymer Grip
  • Ambidextrous fire selector.
  • 30/120rd magazine cut-off


Length: 825.5mm - 908.1m
Weight: 3220g
Inner Barrel: 396.9mm
Bore Diameter:  6.05 mm
FPS: Adjustable 390 to 440fps  with .20g bbs
Magazine Capacity: 30/120rd Mid Capacity. Works with KWA M4 / M16 Series Airsoft AEG Magazines
Thread Direction: 14mm Negative
Gearbox: Ver 2.5 Full Metal
Motor: Long Type
Fire Modes: Semi/Full-Auto, Safety
Battery: 9.6v Small Butterfly Type recommended (Battery not included. Wired to stock with small Tamiya connector)
Hopup: Yes, Adjustable
Package Includes: Gun, magazine, manual, FPS adjustment tool
Manufacturer: KWA