Ares Octarms Pro SR16 AEG with EFCS Unit

Product code:
  • Electronic Trigger
  • Quick Change Spring
  • Programmable Gearbox

An Airsoft Electric Gun featuring Ares' third generation programmable gearbox, an electronic trigger, quick change spring system and built-in MOSFET, all encased inside a gorgeous Alloy receiver with KAC trademarks.

Full description


This Airsoft Electric Gun is the latest and greatest from ARES and features their latest generation of programmable gearbox, which offers the user the ability to rapidly alter fire selector settings (burst mode etc.) at the touch of a button with the ARES Programmer Module. This is great for those that like to switch up their play-style and fill multiple roles on a team or as an individual. The quick change spring system makes it very quick and easy to change the output velocity of the rifle, which when coupled with the programmable gearbox leaves you with a very adaptable rifle which can fill any role on the skirmish field.

The externals are made from a mixture of Alloy and Polymer, coming together to create a rock solid rifle which feels and looks great. The outer barrel assembly and flash hider are made of Alloy, and features a 14mm CW thread once the flash hider is removed. The handguard features M-LOK rail slots for compatible accessories/adapters, and a full length top 20mm rail which runs down the top of the handguard all the way to the rear of the receiver. There are QD sling sockets on both sides of the handguard for the quick attachment of sling loops. The upper and lower receiver are crafted from a tough Polymer which looks and feels convincing, and is very close to the finish you get on a .22LR AR style rifle. Also on the receiver is an engraved Knights Armament logo along with the text 'STONER RIFLE' and a serial number. The buffer tube is also constructed from Alloy and features a sling plate with QD sling sockets on either side. Sat on the buffer tube is the standard stock that comes with all up-market ARES models, and can be quickly extended or closed to find the right length for you.

If you're in the market for an AEG with all the features we've come to expect of top shelf Airsoft Guns, that can quickly adapt to any and all environments, then the ARES Pro SR16 is the one for you.


  • Electronic Trigger
  • Quick Change Spring
  • ARES Gen 3 Gearbox
  • Version 2 Gearbox
  • Rear wired
  • Mini Tamiya connector
  • Flip-up ironsights included
  • Six position sliding stock
  • 300rnd high capacity magazine
  • KAC Logo
  • 14mm CW threaded outer barrel
  • Alloy M-LOK / RIS handguard
  • Full length top 20mm rail
  • QD sling sockets on handguard
  • QD sling socket buffer plate

Package Includes:

  • Octarms Pro SR16 AEG with EFCS Unit
  • 300rnd Magazine
  • Instruction Manual



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,
FPS Icon
FPS (Feet Per Second), using 0.20g BB
Approx. 295fps ± 10%, using 0.20g BB
Site Legal Icon
Site Legal, using 0.20g BB
Included Items
  • Magazine
  • Instruction Manual
Skill Level Icon
User Skill Level
Regular Player

Weight and Dimension

Weight KG Icon
Weight (KG)
Approx. 2.1kg
Weapon Length Collapsed
Length (Collapsed)
Weapon Length Extended
Length (Extended)


Colour Wheel Greyscale
Primary Colour
Colour Wheel Greyscale
Secondary Colour
Two Tone Icon
Pre Two-Toned
Construction Icon
Alloy barrel assembly, handguard, receiver, buffer tube and trim. Polymer pistol grip & stock.
Weapon Construction External
External Construction
Gearbox Icon
Internal Construction

Weapon Specific

Power Source Icon
Powered By
Blowback Icon
Weapon Platform
M4 / AR15 / M16
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 plate when charging handle to the rear


Weapon Furniture Icon
  • Railed Handguard
  • Railed Receiver
  • Ambidextrous Magazine Release
  • Sliding Stock
  • Ambidextrous Fire Selector
  • QD Sling Point
Rail System Icon
Rail System
20mm RIS / RAS , MLOK Rail System,
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 , Handguard , QD ,


Icon Thread Type
Outer Barrel Thread Type
Icon Thread Direction
Outer Barrel Thread Direction
CW (Clockwise)
Outer Barrel Thread Size

Magazine Specific

Magazine Type
High Capacity, AEG,
Magazine BB Capacity
Approx. 300 Rounds
Magazine BB Fill Method
Fill Window
Magazine BB Fill Location

Electric Gun Specific Information

Gearbox Icon
Gearbox Version
V2 Gearbox
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
295FPS @ 700RPM w/ 7.4v LiPo
Notepad Icon
Tested Using
ASG Blaster 0.20g BBs
Notepad Icon
Test Date

Take this Airsoft gun to the next level!

Like this Airsoft Gun? Check out these awesome Products!