The 
EMG Helios EV01 Bolt Action Sniper Rifle by ARES
 in Urban Grey (EV01-UG) is a spring-powered airsoft rifle built on the reliable ARES Striker platform, known for its short bolt pull and extensive upgrade compatibility. It blends a classic M40-style chassis with modern features. 
 
Key Features
Durable Construction: Features a hybrid build with a high-quality, lightweight polymer stock and a metal receiver, bolt, and fluted outer barrel assembly.
Compact Power Bolt: Utilizes ARES's "Compact Power Bolt" system, which provides the usual power with a shorter, smoother bolt pull, allowing for faster follow-up shots.
High Compatibility: The rifle is highly customizable and is compatible with standard AEG springs and many ARES Striker series parts (specifically Gen 2 internals like the AS02 trigger unit).
User-Friendly Design: Includes an ambidextrous magazine release, a unique trigger-guard safety lever, and a loaded chamber indicator.
Integrated Tools: Essential hex keys for basic maintenance and hop-up adjustment are conveniently stored within the pistol grip.
Optics Ready: A 20mm Picatinny top rail is included for mounting scopes and other optics. It is also compatible with Harris-style bipod mounts. 
Specifications
Feature 
Specification
Manufacturer
EMG Helios / ARES
Fire Mode
Bolt Action (Single Shot)
System
High Power Spring
FPS Range (w/ 0.20g BBs)
~415–420 FPS (approx. 1.75 Joules)
Magazine Capacity
55 Rounds
Length
1085mm (~42.7 inches)
Weight
~2.61 kg (~5.75 lbs)
Hop-Up
Yes, Adjustable (TDC-style dial)
Barrel Thread
23mm CW (Clockwise)