M4A1 (SA-B01 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 in mind, suitable for use in close quarters and urban combat.
In the 1960s, the M16, developed by Armalite and adopted by the US Army, served as the foundational design for the M4. In the 1980s, the first prototypes of the M4 emerged with a shorter barrel and telescopic stock, improving maneuverability in confined spaces.
In the 1990s, the M4 was officially adopted by the US Armed Forces as the standard carbine, replacing older models like the M3 and M9. The rifle features the capability of firing single shots or bursts, making it a versatile weapon.
The M4 quickly became popular among soldiers due to its light weight, compactness, and reliability. It was widely used in conflicts such as the Iraq and Afghanistan wars and became an iconic weapon of the modern US armed forces.
Besides 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 from the One™ series by Specna Arms emphasizes top-quality metal body construction and premium CNC metal internal parts.
Compared to the Edge series, it differs in that it does not include a MOSFET (or a processor unit in Edge 2.0), the piston has only one metal tooth, and the spring change system is different (more time-consuming).

What does Specna Arms M4A1 (SA-B01 ONE™) offer?

Internal Parts

The replica M4A1 (SA-B01 ONE™) is equipped with classic mechanical trigger contacts, making it safe to use only with Li-Pol batteries 7.4V or you can use classic NiMh cells.
The weapon is equipped with an adjustable Hop-up chamber with a quality rubber for excellent range.
It also features the increasingly common standard of the QSC quick spring change system Enter&Covert, which allows you to install a stronger/weaker spring as you see fit. The spring can be changed only after removing the gearbox from the weapon body (basic knowledge of disassembling external parts of AEG weapons such as the stock, grip, etc. is required).
The gearbox is reinforced and includes premium internal parts (listed below in the description), with the manufacturer stating the gearbox's durability up to an M120 spring.

External Parts

The replica Specna Arms M4A1 (SA-B01 ONE™) excels with its quality external construction and surface finish that is highly resistant to scratches. The weapon's body is matte coated, giving it an elegant appearance.
The ergonomic design of AR15 rifles and modern construction ensures comfortable handling and easy operation.
With an adjustable Bushmaster type stock, this replica is ready for various game scenarios. The battery is placed only in the buffer tube and it is necessary to choose batteries of the Stick (buffer) type.
Overall, it is a rifle that combines top performance with an attractive design for maximum player satisfaction.
On the external barrel, there is a standard 14- mm (CCW) thread, so the weapon can be equipped with a silencer, compensator, or a Tracer unit.

Key Features

• High-quality metal body
• Bushmaster type stock
• V2 gearbox with QD Enter&Covert system
• 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
• High-capacity magazine (Hi-Cap) for 300 BBs
• Spare weaker spring (M90) for CQB
• User manual

We can re-solder the connector to a different one upon request. Simply write the request in the order note.