The KWA VM4A1 Carbine is an upgraded AEG that features KWA’s Variable Performance System (VPS) for improved efficiency. With a Switch Life Extender to reduce trigger wear and magazine cutoff compatibility, it’s perfect for Milsim and Field players. Adjustable FPS lets users customize their rifle using the included VPS tool.
This enhanced M4A1 has a full metal upper receiver, a new rotary hop-up, and a PTS Enhanced Polymer Grip for comfort. It’s rear-wired, Li-Po ready, and comes with an updated reinforced metal gearbox featuring ambidextrous selector switches, 9 mm ball bearings, and precision metal gears. The KWA VM4A1 Carbine delivers high performance and reliability right out of the box.
AEG Variable
AEG Variable Performance System (VPS) offers airsoft players the flexibility to adjust their gun’s FPS easily, making it adaptable for both indoor and outdoor fields. This system ensures consistent performance across different power settings, allowing for quick adjustments to meet field regulations. Integrated seamlessly into the gearbox, the VPS enhances the versatility and reliability of KWA airsoft guns, providing players with optimal performance and control in any game scenario.
Cut-Off Feature
The KWA Cutoff feature enhances the realism and functionality of KWA airsoft guns by mimicking the operation of a real firearm’s bolt catch. When the magazine is empty, the cutoff feature stops the gun from firing, requiring the insertion of a new magazine and engagement of the bolt release to continue shooting. This system not only adds to the immersive experience but also encourages players to practice tactical reloads and proper shooting techniques, making it beneficial for both recreational play and serious training.
Switch Life Extender
The KWA Switch Life Extender (SLE) is an innovative feature designed to enhance the longevity and reliability of your airsoft gun’s electronic components. This system helps protect the trigger switch assembly from the wear and tear caused by high rates of fire and rapid trigger pulls. By reducing the electrical arcing and minimizing the risk of short circuits, the SLE ensures smoother operation and extends the lifespan of the internal electronics.
NOTE: Battery and Charger are not included.
VM4A1 HIGHLIGHTS

The new KWA AEG3 RM4A1 Carbine is the first model in the new 3rd gen AEG family. This updated ERG model now shares the the newest features of the recently introduced AEG 2.5 system, PLUS simulated recoil with KWA’s patented Kinetic Feedback System. Highlighted by a Switch Life Extender to minimize the wear and tear on trigger contacts, the AEG 3 combines ultimate AEG rifle with a more cost-effective training solution to provide players and professionals the best airsoft experience. Additional features include magazine cutoff compatibility combined with a quick-change spring for users to customize their KWA AEG rifle to their own specifications.
This updated ERG takes the professional airsoft training M4A1 model to a new level of performance with a one-piece full metal alloy upper receiver, a new rotary hop up and a PTS Enhanced Polymer Grip for added comfort. Rear-wired and Li-Po ready, the RM4A1 can still handle the extra power of LiPo batteries. The RM4A1 is also equipped with a reinforced metal gearbox utilizing KWA’s unique 9mm ball bearing bushing combination and case hardened, upgraded precision metal gear sets. Heavy duty springs and a new high-torque motors are matched for optimum results. The KWA RM4A1 Carbine was engineered to outperform, offering ultra high performance and training simulation straight out of the box.
The all new AEG 3 RM4A1 features:
Improved high-torque motor (new)
Upgraded high-speed gear set (new)
Switch Life Extender to prevent contact burnout (new)
Quick-change spring set up
30/120rd. magazine cut off compatibility (new)
PTS Enhanced Polymer Grip (new)
Rotary hop up
One-piece upper receiver
The AR15 was originally designed as part of the U.S. military’s initiative to develop a lightweight and smaller caliber weapon as the standard infantry rifle. This innovative weapon utilized aircraft technology to lighten the rifle’s overall weight. This led to the creation of the M16, which has served as the backbone of the U.S. Military for more than 40 years.
The KWA AEG 3 RM4A1 is an AR style, Automatic Electric Gun [AEG] that utilizes the patented Kinetic Feedback System [KFS]. This gives the user felt recoil with every trigger pull. This updated KWA AEG 3 RM4A1 also features a mechanical/electrical cut-off system to stop firing when the magazine is empty at 30 and 120 rd. intervals. Standard features of the RM4A1 include metal alloy receivers, MilSpec buffer tube and stock, a flat top rail, which allows operators to customize their weapon configuration, and an operational bolt catch feature that provides the user with unparalleled realism by mimicking fundamental AR15 weapon manipulation. Similar to real AR15 style rifles the RM4A1’s modular design allows limitless customization options to best suit the individual’s training and MilSim needs.
NOTE: Battery and Charger are not included.

Tool-less Hop-Up
Easily Adjustable Hop-Up. KWA’s adjustable hop-up lets you fine-tune the backspin for optimal performance and pinpoint accuracy with any BB weight.
High-Speed Gear Ratio
Optimized for Rapid Performance. KWA’s high-speed gear ratio is engineered for faster cycle rates, ensuring quicker trigger response and higher rates of fire.


Cut-Off Feature
Enhance Realism in Your Gameplay. The cut-off feature stops your airsoft gun from firing when the magazine is empty, adding authenticity and encouraging proper reload techniques.
AEG Variable Performance System (VPS)
Easily Adjust FPS for Indoor and Outdoor Games. The KWA VPS system offers quick, easy FPS adjustments built into the gearbox, letting you truly play anywhere.


30-120RD Magazine
Adjustable Magazine Capacity. This magazine offers customizable capacity, letting you switch between a standard 30-round setup for training or a full 120-round load for increased firepower during gameplay.