Umbrella Armory ARC M4 | Arcturus MLOK Custom AEG – Umbrella Armory .EU

Umbrella Armory ARC M4 | Arcturus MLOK Custom AEG

£552.00
incl. VAT ††

Umbrella Armory ARC M4 | Arcturus MLOK Custom AEG

£552.00

Professionally tuned performance. Ready to play out of the box.


  • Umbrella Armory high-end barrel system
  • Precision hop-up tuning
  • Fully inspected internals
Estimated to ship on January 30 and deliver on February 03
Shipping calculated at checkout.
Estimated to ship on January 30 and deliver on February 03
Shipping calculated at checkout.
£552.00
incl. VAT ††

Battle ready

Fine tuned so you are ready to play out of the box.

High-end barrel system

Premium 6.01mm precision inner barrel with Maple Leaf bucking and CNC hop-up unit for superior accuracy and consistency.

Precision hop-up setup

Professionally tuned hop-up system ensures optimal BB trajectory and maximum effective range for every shot.

Professional inspection & tuning

Every rifle undergoes thorough inspection and fine-tuning by our expert technicians to ensure peak performance out of the box.

PRECISE

Umbrella Armory Barrel System.

Our precision-engineered barrel system features a high-end 6.01mm inner barrel that delivers exceptional accuracy and consistency. Every barrel is carefully matched with precision air seals to ensure optimal compression, while our optimized alignment process guarantees perfect barrel-to-hop-up integration for maximum performance.

Umbrella Armory Barrel System.
CONCISTENT

Precision Hop-Up Setup.

Each rifle receives a premium bucking carefully selected and installed for optimal BB contact and spin. Our tuned hop-up unit is precisely adjusted to provide consistent backspin across all BB weights, ensuring maximum effective range and accuracy with every shot.

Precision Hop-Up Setup.
INSPECTED

Internal Inspection & QC.

Before leaving our workshop, every gearbox undergoes comprehensive inspection to verify all components are properly installed and functioning. Compression is tested and verified to ensure optimal air seal, and each rifle is performance tuned to deliver consistent velocity and reliability.

Internal Inspection & QC.
ENGRAVED

Umbrella Armory Markings.

Every upgraded rifle features our distinctive Umbrella Armory logo, a unique serial number for tracking and warranty purposes, and professional branding that identifies your rifle as a premium Umbrella Armory build. These markings are precision laser-engraved for durability and authenticity.

Umbrella Armory Markings.

Comparison Table

You're not paying for parts. You're paying for performance that actually works.

Feature Stock Arcturus Umbrella Armory ARC M4
Inner barrel Standard High-end system
Hop-up tuning Factory Umbrella Armory tuned
QC Factory Professional
Ready to play ⚠️
Time spent Hours None

What's in the Box

What's in the Box

Umbrella Armory ARC M4 rifle

Magazine

Umbrella Armory QC card

Documentation

Gun Box with Foam Filling and Carrying Handle

Legal and safety

Requires to be 18 years or older. Handle with safety googles and protective gear only.

Long product info

✅ Umbrella Armory High-End Inner Barrel System
✅ Precision Hop-Up Unit + Premium Bucking
✅ Full internal inspection & quality control
✅ Unique Umbrella Armory markings & serial number
✅ Magazine included
✅ Out-of-the-box performance tuning

Short description

Instead of spending hours upgrading parts and tuning hop-up systems, you get a rifle that has already been optimized by Umbrella Armory technicians. This is performance without compromise — engineered for players who demand reliability, precision, and consistency.

Barrel inner diameter mm

6.01

Barrel length mm

310.0

Battery connector

DEANS (T-Plug)

Battery required voltage

11.1V

Brand

Umbrella Armory

Compatibility

  • v2 fully upgradable

Effective range m

60.0

Hopup type

Rotary Style CNC HopUp

Magazine type

M4

Manufacturer

Arcturus

Material frame

Alloy

Mosfet

High Speed Button Trigger with Active Breaking

Platform type

M4

Warranty period

24 Months Limited Warranty

Barrel type

Umbrella Armory 6.01 Inner Barrel with Maple Leaf Bucking and CNC HopUp

Buffer tube

6-Position Collapsible Buffer Tube

Engine

V2 Gearbox 13:1 Short Stroked

Flash hider

Muzzle Brake

Gearbox version

v2

Gun bag

Gun Box with Foam Protection and Carrying Handle

Handguard

MLOK System

Mag catch

Right Side

Outer barrel

Full Metal

Pistol grip

Ergonomic Type

Receiver

with Laser Engraved Markings and Serial Number

Selector switch

Safe/Semi/Full-Auto

Sling plate

Hook on Design

Stock

Polymer Stock

Trigger

Flat Trigger with High Speed Button activation

All rifles hand built and fine tuned. Settings may vary. Use this as a baseline

Engine Overview

Operation Mode
Safe/Semi/Full-Auto

Performance Limits

RPS Limit
25

About Umbrella Armory

Umbrella Armory is a performance engineering workshop specializing in precision-tuned airsoft rifles and HPA systems. Founded in California and now operating in Austria, Umbrella Armory builds fully optimized replicas for competitive players who demand real ballistic consistency and reliability.

Every rifle is individually assembled, calibrated, and verified under live conditions to deliver perfect shot-to-shot accuracy and efficiency.

Umbrella Armory’s mission is to bring professional-grade performance to serious players worldwide — combining craftsmanship, testing, and innovation for the most consistent airsoft systems in the field.

Frequently Asked Questions

For the best performance, use 0.32g BBs from the highest quality manufacturers. We recommend purchasing only our recommended BB brands to ensure optimal accuracy, range, and consistency. Lower quality BBs can affect performance and may cause jamming or feeding issues.
Use 11.1V high-quality LiPo batteries for the best trigger response and full-auto rate of fire. Quality batteries ensure consistent performance and help protect your rifle's electronics. Always use batteries with the correct connector type and proper capacity for your needs.
Clean the barrel regularly to maintain optimal performance. Use quality cleaning supplies and follow proper cleaning procedures. Do not open the gun yourself. Instead, use our professional service packages for maintenance, repairs, and upgrades. Our certified technicians ensure your rifle is properly maintained and tuned.
We offer a 24-month warranty for any parts that are not considered wear and tear. This covers manufacturing defects and component failures under normal use. Please see our terms and conditions for full warranty details and coverage information.
We offer a 14-day return policy. If you're not completely satisfied with your purchase, you can return it within 14 days of delivery. The item must be in original condition and packaging. Please contact our customer service team to initiate a return.
Yes, your Umbrella Armory rifle comes fully tuned and ready to play. Each rifle undergoes professional inspection, quality control, and performance tuning before shipping. Simply add your battery, BBs, and you're ready to go.
While the rifle is fully upgradable, we strongly recommend using our professional service packages for any modifications or upgrades. Opening the gearbox yourself can void the warranty and may cause damage. Our technicians have the expertise and tools to ensure upgrades are done correctly and safely.
Every Umbrella Armory rifle features our high-end barrel system, precision hop-up setup, and professional inspection & tuning. We use premium components and perform extensive quality control to ensure consistent, reliable performance. Each rifle is individually tested and tuned before shipping.
We recommend cleaning the barrel after every 2-3 game days or approximately every 5,000 rounds. More frequent cleaning may be needed if you notice a decrease in accuracy or if you're using lower quality BBs. Regular maintenance ensures optimal performance and extends the life of your rifle.
Yes, we offer comprehensive professional service packages for maintenance, repairs, and upgrades. Our certified technicians can perform everything from routine maintenance to full rebuilds and custom tuning. Contact us to schedule a service appointment or learn more about our service packages.
†† Local VAT incl. for purchases made within the European Union