ARCTURUS GR16 MOD5 Assault Rifle

  • Microswitch Trigger
  • Quick Change Spring
  • 6.01mm Inner Barrel

A seriously tough and Alloy constructed 416 family replica from Arcturus, which is powered by a Battery in the Sliding Stock at the rear. As with most Arcturus products, the external shell is incredibly robust and the internal parts list makes for great reading too, including a Microswitch Trigger.

Full description


This Airsoft Electric Gun is a replica of a very well known Assault Rifle series, recreated in a gorgeous and solid external shell made from Aluminium and Alloy, with Steel being used for various trim components like the Fire Controls. These externals are protected from corrosion via an unmentioned process. The quality continues internally with a reinforced gearbox which is bristling with mouth-watering parts. The key notes of these internals are a Quick Change Spring System which allows for rapid Main Spring changes once the Gearbox has been removed from the body and a Microswitch Trigger for improved response and decreased chance of damage.

The front of the rifle features a precisely-crafted 20mm Railed Handguard which offers four points of accessory attachment, numbered rail slots and a solid Alloy Outer Barrel Assembly running through it, on the end of which sits a 14mm CCW Thread hidden underneath the Flash Hider. Simply unscrew the Flash Hider to install Muzzle Devices such as Suppressors and Tracer Units. The top of the replica has a full length top 20mm rail running the length of the Handguard and Receiver, and can accept any number of Sights and Scopes, leaving you free to create all sorts of tactical and wacky setups. This rail comes with an integrated Flip Up Front Sight Post and Quick Release Rear Sight Post (which I'm told is what all new HK rifles come attached with).

The Receiver layout is quite similar to the typical AR platform but has a few changes, namely the addition of full Ambidextrous Controls. The Fire Selector, Magazine Release and Bolt Release can all be operated from either side of the Airsoft Gun, making this 100% left-hander compatible. Other points of note around the Receiver are an Ambidextrous Sling Plate, Extended Charging Handle and an enlarged Trigger Guard for glove users. By pulling back on the Charging Handle you will open the Dust Cover and Mock Bolt, revealing a Rotary HOP Adjustment inside which can be used to apply backspin to your BBs and theoretically improve Range / Consistency with the right settings and BBs. The Mock Bolt will lock to the rear like the real thing, which makes HOP adjustments much easier, and can be released again by pressing one of the two Bolt Releases.

The rear of the Airsoft Replica features a Six Position HK Slim Line Stock on an AEG Spec Buffer Tube (standard Airsoft Stocks will fit!), which is also where a Battery should be connected. To remove the Stock, push the Stock Release Trigger and move the Stock to the rear position of the Buffer Tube. Once at the end of the tube, pull down on the front of the Stock Release Trigger and pull the Stock off the Buffer Tube. Inside the tube you will see the Mini Tamiya Connector and Wiring Loom. Alternatively, you can remove just the Rubber Butt Pad by pulling on the small switch and sliding the Pad downwards.

Internally the rifle has a mouth-watering list of features which goes as such: Quick Change Spring System for rapid Main Spring changes once the Gearbox is removed from the body - great for those who play at many different sites with various power rules - a Spring Guide w/ Bearings, Bearing Piston Head, Full Steel Teeth Polycarbonate Piston, Steel Gears, 8mm Steel Bushings, a Microswitch Trigger, Low Resistance Wiring, Sealed Air Nozzle, Metal Rotary HOP Unit and Precision 6.01mm Hardened Steel Inner Barrel. Another feature worth mentioning is the Unique Serial Number for each Gun, which is crucial to identifying a rifle (especially should it ever be stolen).

Included in the box is a Thermold-Style Variable Capacity Magazine which can hold either a total of 30 or 130 BBs. To change the overall capacity, press the button on the base of the mag and slide off the baseplate. Remove the inner sleeve of the magazine and change the labelled switch. A speedloader is required to load these magazines unless you plan on hand-loading 130 BBs. Also included in the box is a set of Allen Keys and various spare components such as pins. If you're looking for a rock-solid and well constructed 416 platform Airsoft Electric Gun but don't want to break the bank on a Tokyo Marui / VFC or compromise on quality, then the Arcturus GR16 MOD5 Assault Rifle is a strong contender. 


  • 416 Family Replica
  • Microswitch Trigger
  • Quick Change Spring
  • Rock-Solid Build Quality
  • 14mm CCW Thread
  • Inner Barrel: 280mm / 6.01mm
  • 30/130rnd Variable Capacity Mag
  • Steel Trim Components (Fire Controls)
  • Rotary HOP Unit
  • 20mm Railed Handguard
  • 20mm Railed Receiver
  • Unique Serial Number
  • Left Handed Friendly RIF
  • Ambidextrous Fire Selector
  • Ambidextrous Mag Release
  • Ambidextrous Bolt Release
  • Ambidextrous Sling Plate
  • HK Battle Grip
  • HK Slim HS2 Stock
  • Sliding Six Position Stock
  • Rubber Butt Pad
  • Extended Charging Handle
  • Flip-Up Ironsights
  • Removable Birdcage Flash Hider
  • Front Sling Point
  • Enlarged Trigger Guard
  • Numbered Rail Slots
  • Functional Mock Bolt Release
  • Internally:
    • Reinforced Gearbox
    • Spring Guide w/ Bearings
    • Bearing Piston Head
    • Full Steel Rack Polycarbonate Piston
    • Steel Gears
    • 8mm Steel Bushings
    • Microswitch Trigger
    • Low Resistance Wiring
    • Sealed Air Nozzle
    • 6.01mm Steel Inner Barrel

Package Includes

  • ARCTURUS GR16 MOD5 Assault Rifle 
  • 30/130rnd Mid Cap Magazine
  • Cleaning/Unjamming Rod
  • Testing Sheet
  • User Manual
  • Tools

Special Instructions

Please note that these Airsoft Guns arrive with us somewhere between 345FPS and 360FPS and will need to be downgraded on a case-by-case basis.

The adjustable dial on the front of the Gas Block doesn't have a function and is purely for show. In the real world this knob would adjust the amount of gas being sent to the recoil system to ensure smooth operation once you install a Suppressor.

The externals of the replica are metal where they would be on the real world gun. This includes things like the outer barrel, handguard, and receiver. If a real world gun has polymer parts then the gun will still be marked as full metal externals, examples of this would be an M4, where the Stock and Pistol grip are always made from Polymer.



Weapon Construction External
Weapon Type
Assault Rifle
Over 18 Only Icon
Over 18
Icon UKARA - United Kingdom Airsoft Retailer Association
Defence / UKARA Required
Yes, No,
Screwdriver Icon
Included Items
  • Magazine
  • Instruction Manual
  • Cleaning Rod
  • Allen Key
Skill Level Icon
User Skill Level
Regular Player

Weight and Dimension

Weight KG Icon
Weight (KG)
Approx. 2.84kg
Weapon Length Collapsed
Length (Collapsed)
Weapon Length Extended
Length (Extended)


Colour Wheel Greyscale
Primary Colour
Black, Tan ,
Two Tone Icon
Pre Two-Toned
Construction Icon
Aluminium Alloy receiver, handguard and outer barrel assembly. Steel flash hider, fire controls and trim. Polymer pistol grip and stock.
Weapon Construction External
External Construction
Gearbox Icon
Internal Construction

Weapon Specific

Power Source Icon
Powered By
Blowback Icon
Weapon Platform
AR Platform, 416 Series,
Magazine Style Icon
Magazine Style
STANAG, AR Platform,
Fire Select Icon
Fire Selector
PatrolBase | Fire Select Safe
Patrol Base | Fire Select - Semi Automatic
Semi Automatic
Patrol Base | Full Automatic
Full Automatic
Weapon Safety Features Icon
Safety Features
Trigger Lock
Shooter Configuration Icon
Shooter Configuration
Weapon Configuration Icon
Weapon Configuration
Weapon Scale Icon
Weapon Scale
Suggested BB Weight


Hop-Up Unit Icon
Hop-Up Unit
Hop-Up Unit Adjuster Icon
Hop-Up Adjuster
Hop-Up Unit Location Icon
Hop-Up Location
Behind mock bolt when charging handle pulled to the rear


Weapon Furniture Icon
  • Railed Handguard
  • Railed Receiver
  • Ambidextrous Magazine Release
  • Sliding Stock
  • Ambidextrous Fire Selector
  • Ambidextrous Bolt Release
  • Threaded Outer Barrel
Rail System Icon
Rail System
20mm RIS / RAS
Icon Stock Positions
Stock Setting
Weapon Length Extended
Stock Positions
6 Position
Sight Type Icon
Sight Type
Iron Sights
Sling Plate Icon
Sling Options
Buffer Plate


Icon Thread Type
Outer Barrel Thread Type
Icon Thread Direction
Outer Barrel Thread Direction
CCW (Counter Clockwise)
Outer Barrel Thread Size
Inner Barrel Diameter
Inner Barrel Length

Magazine Specific

Magazine Type
Medium Capacity , AEG, Adjustable Capacity,
Magazine BB Capacity
Approx. 130 Rounds
Magazine BB Fill Method
Speed Loader
Magazine BB Fill Location

Electric Gun Specific Information

Wiring Icon
Gearbox Wiring
Rear Wired
Spring Change Icon
Gearbox Quick Change Spring
Digital Trigger Icon
Gearbox Electronic Trigger
Battery Specific
Battery Connector
Patrol Base | Icon | Mini Tamiya
Mini Tamiya
Suggested Battery
Suggested Battery Type
Suggested Battery Configuration
Suggested Battery Voltage

Product Testing Data

Notepad Icon
Test Description

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