SA SR25 URX (SA-E36 Edge™ Kestrel™ ETU) - Black / Tan

Stoner Rifle-25 and Its History

The SR-25, also known as MK11 MOD 0, is a highly popular DMR rifle known for its precision craftsmanship and attention to detail. The original weapon is widely used by elite units worldwide, including US Navy SEALs and US Army Special Forces (Green Berets). Designed by Knight's Armament Company, the SR-25 is an evolution of the ArmaLite series, built to provide semi-automatic sniper capabilities for special operations units requiring accuracy, reliability, and sustained fire support. The rifle quickly became a favorite among marksmen in the U.S. armed forces due to its ability to engage targets at medium to long ranges while maintaining semi-automatic firepower.

Internal Components of the Specna Arms SR-25 Edge Series

The rifle features the E-Shooter Kestrel ETU processor unit, ensuring safe motor operation, improving trigger response, prolonging battery life, and increasing rate of fire. It supports Li-Pol batteries 7.4V and 11.1V. Additionally, it offers adjustable trigger sensitivity, pre-cocking, and various fire modes.
The rifle is equipped with an adjustable hop-up chamber and a high-quality bucking for exceptional range. The gearbox is reinforced with precision-cut radius corners to prevent front-end cracking. It includes premium components such as 8mm metal ball bearings, a metal nozzle, and reinforced cylinder and piston heads. The manufacturer rates the gearbox for springs up to PSG 120. Additionally, it features the ESA quick spring change system, allowing users to swap springs without disassembling the gearbox.

Advantages of the ETU Kestrel Processor Unit

• Simple Configuration:
  Easy 3-step setup via the trigger. Reset all functions by holding the trigger for 8 seconds.
  
  
• Pre-Cocking System:
  Five pre-cocking levels for customized performance. The system auto-learns piston positioning and adjusts accordingly. Upon reconnecting or disconnecting the battery, the system fires a few calibration shots.
  
  
• Brushless Motor Support:
  Compatible with high-torque and high-speed motors.
  
  
• Extended Durability:
  Maintains optimal performance even after 50,000+ shots.
  
  
• Active Braking:
  Ensures piston stops at an ideal position, reducing gearbox wear.
  
  
• Locked Rotor Protection:
  Prevents gearbox damage in case of motor failure.
  
  
• Battery Protection:
  Motor vibrates, and the blue LED flashes five times when the battery is low.
  
  
• Voltage Detection:
  Automatically detects lithium battery cell count and supports 6V–17V power sources.

Superior External Construction

The SR-25 rifle features a highly durable exterior with a scratch-resistant matte coating, giving it a professional finish. The ergonomic AR-15-based design ensures a comfortable grip and easy handling.
CNC-machined URX handguard allows for mounting accessories such as grips, AN/PEQ boxes, and flashlights. The adjustable Crane stock accommodates Buffer Stick, Nunchuck, or Crane batteries. The outer barrel has a standard 14mm CCW thread, making it compatible with suppressors, flash hiders, and tracer units.

Key Features

• Durable metal body
• Functional bolt catch for hop-up adjustment
• Includes two 40-round magazines
• Crane stock for multi-cell battery storage
• Extended V2.5 gearbox with QSC quick spring change
• Reinforced extended polymer piston (PSG/SR25/L85)
• Aluminum nozzle
• Aluminum cylinder head with double sealing
• Aluminum piston head with sealing
• 8mm ball bearings
• 16:1 ratio steel gears (SR-25)
• Polymer rotary hop-up chamber (M4 type)
• ETU Kestrel V2 processor unit from E-Shooter

Technical Specifications

• Power Source: AEG
• Length: 880–965 mm
• Weight: 4360 g
• Barrel Length: 430 mm
• Muzzle Velocity: 130 m/s
• Material: Metal, polymer
• Thread: 14mm CCW
• Magazine Capacity: 40 BBs (Mid-Cap)
• Connector Type: T-Dean
• Connector Location: Inside the stock
• Gearbox Type: V2.5 (SR-25)

Package Contents

• Specna Arms SR-25 AEG Rifle
• 2x magazine for 40 BBs
• User manual