SA M4A1 RIS (SA-K02 ONE™) - Black

Assault Rifle M4

M4 is a compact automatic rifle developed in the United States based on the popular M16 assault rifle. It was designed with the need for a lighter and shorter version of the M16 that would be suitable for use in close quarters and urban combat.
In the 1960s, the M16, developed by Armalite and adopted by the U.S. military, was the foundational design for the M4. In the 1980s, the first prototypes of the M4 appeared, featuring a shorter barrel and a telescopic stock, enhancing maneuverability in confined spaces.
In the 1990s, the M4 was officially adopted into the U.S. armed forces as the standard carbine, replacing older models like the M3 and M9. The rifle is characterized by its capability to fire both single shots and bursts, making it a versatile weapon.
The M4 quickly became popular among soldiers due to its lightweight, compactness, and reliability. It was widely used in conflicts such as the Iraq War and the Afghanistan War and became an iconic weapon of modern U.S. armed forces.
In addition to the standard model, there are many variants of the M4 equipped with different accessories and enhancements to meet the specific needs of military units.
The airsoft AEG assault rifle M4 series One™ from Specna Arms emphasizes high-quality metal body workmanship and superior CNC metal internal parts.
Compared to the Edge series, it differs in that it does not include a MOSFET (or processor unit in the Edge 2.0), the piston has only one metal tooth, and there is a different (more time-consuming) spring change system.

What does the Specna Arms M4A1 RIS (SA-K02 ONE™) offer?

Internal Parts

The replica M4A1 RIS (SA-K02 ONE™) is equipped with classic trigger (mechanical) contacts, thus it is safe to use only Li-Pol batteries 7.4V or you can use classic NiMh cells.
The gun is equipped with an adjustable Hop-up chamber with a quality rubber for excellent range.
Additionally, in today's standards, it features the increasingly common QSC quick spring change system Enter&Covert, allowing you to install a stronger/weaker spring as needed. The spring can only be changed after removing the gearbox from the gun body (requiring basic knowledge of disassembling external parts of an AEG gun such as the stock, grip, etc.).
The gearbox is reinforced and includes superior internal parts (listed below in the description), and the manufacturer states the gearbox's durability up to a M120 spring.

External Parts

The replica Specna Arms M4A1 RIS (SA-K02 ONE™) stands out with high-quality external craftsmanship with a scratch-resistant finish. The body of the gun is matte painted, giving it an elegant appearance.
Ergonomic design of the AR15 rifles and modern construction ensure comfortable handling and easy operation.
CNC metal RIS handguard M4 allows for the attachment of various accessories such as grip, AN/PEQ box, flashlight, etc.
With an adjustable stock type Crane, this replica is ready for various game situations and allows for battery insertion (types Buffer Stick, Nunchuck, or Crane).
Overall, this is a rifle that combines top performance with an attractive design for maximum satisfaction for you, the players.
On the external barrel, there is a classic 14- mm (CCW) thread, allowing the gun to be equipped with a suppressor, compensator, or a Tracer illumination unit.

Key Features

• High-quality metal body
• Crane type stock for multi-part batteries
• V2 gearbox with QD system Enter&Covert
• QD metal spring guide with bearing
• Reinforced polymer piston with 1 metal tooth
• Aluminum nozzle
• Aluminum cylinder head with double sealing
• Aluminum piston head with sealing
• 8mm ball bearings for smooth operation
• Gear set with 18:1 ratio
• Polymer rotary hop-up chamber

Package Contents:

• Specna Arms AEG rifle
• Hi-Cap magazine (300 BBs)
• Spare weaker spring (M90) for CQB
• User manual

We can resolder the connector to a different one upon request. Just write your requirement in the order note.