Army Armament R31 CO2 GBB Airsoft Pistol

Army Armament
  • CO2 Powered
  • Traditional 1911 Style
  • Good in Cold Weather

This CO2 Powered Airsoft Blowback Pistol is a replica of the infamous 1911 design, in traditional layout without any exuberant furniture, compensators or graphics, just good old fashioned, old school cool. As the Pistol is powered by a CO2 Bulb in the Magazine, it is excellent in cold weather and will always finish a whole Magazine on a fresh bulb.

Full description


The Army Armament R31 CO2 Pistol is very realistic in that it is almost entirely made of Alloy, with the exception of the Pistol Grip Covers, which are Polymer. The use of Alloy on the externals makes for a very realistically weighted Pistol, which has a great response when the slide is cycled and makes a good 'clack' sound. The use of CO2 in the Magazines means that it is excellent when the cold weather sets in, as CO2 is less likely to 'Gas Out' over traditional Green Gas. Not only this, but the powerful CO2 gas means the slide cycles in no time, allowing you to get rapid shots out.

The Pistol features an adjustable HOP Unit which can be found by removing the Slide from the Frame. Simply remove the Slide Release (by lining up the appropriate cut-outs on the slide and pushing it out from the Frame) and take the Slide off the Frame. This HOP Up will apply backspin to your BBs and help them to stay in the air for longer. This is particularly effective when paired with a heavyweight BB such as a 0.25g or heavier. The Gun also has a Beavertail Safety, which won't let the Pistol fire unless it is being held properly, as well as a Slide Lock Safety which can be engaged to stop the Slide from moving. There is also a Lower Lanyard Loop, which allows you to secure your Pistol inside a Holster, should it ever drop out whilst you are playing.

The Magazine is loaded by hand loading or using a Speedloader to force BBs in to the Magazine from the top Feed Lips, or at the bottom when the Follower is fully pulled down. A 12g CO2 Sparklet is installed into the Magazine by using the included tool to unscrew the thread and sliding the CO2 bulb in from the side. Secure the screw at the bottom of the Magazine until the hissing from the Bulb stops. Remember to remove any CO2 from the Pistol when you are done using it, being careful to FIRE IT ALL OUT THE GUN rather than releasing the Bulb while it still has pressure inside.

If you're looking for a traditional 1911 Pistol that can actually perform once the cold weather sets in, then the Army Armament R31 CO2 will be of great interest to you.


  • 1911 Platform Replica
  • CO2 Powered Pistol
  • Good Cold Weather Performance
  • 12mm Threaded Barrel
  • 25rnd CO2 Magazine
  • Alloy Construction
  • Traditional 1911 Styling
  • Beavertail Safety
  • Slide Lock Safety
  • Adjustable HOP Unit
  • Lower Lanyard Loop
  • Textured Pistol Grips
  • Thick Protective Baseplate
  • 12g CO2 Bulbs Required
  • Barrel Tool Included
  • Gas Operated Recoil
  • Black Finish

Package Includes

  • Army Armament R31 CO2
  • 25rnd CO2 Magazine
  • Barrel Tool

Special Instructions

You may require a Thread Adapter to make use of the Threaded Outer Barrel. Any of these should work for you:

Army Armament Suppressor Thread Adapter To Pistol 12mm

Lees Precision Engineering CNC Machined 12mm to 14mm CCW Thread Adaptor



Weapon Construction External
Weapon Type
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. 350fps ± 10%, using 0.20g BB
Included Items
  • Magazine
  • Tools
Skill Level Icon
User Skill Level
Regular Player
Patrol Base - Warning Icon
Lubrication is required

Weight and Dimension

Weight KG Icon
Weight (KG)
Approx. 0.842kg
Weapon Length Collapsed
Length (Collapsed)
Weapon Length Extended
Length (Extended)


Construction Icon
Alloy slide and frame, Polymer pistol grip covers
Weapon Construction External
External Construction
Gearbox Icon
Internal Construction

Weapon Specific

Power Source Icon
Powered By
Blowback Icon
Gas Blowback
Weapon Platform
Magazine Style Icon
Magazine Style
R31 CO2
Fire Select Icon
Fire Selector
Patrol Base | Fire Select - Semi Automatic
Semi Automatic
Weapon Safety Features Icon
Safety Features
Slide Lock, Beavertail,
Shooter Configuration Icon
Shooter Configuration
Right Handed
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
Remove slide to access


Weapon Furniture Icon
Rear Lanyard Mount Point
Sight Type Icon
Sight Type
Iron Sights
Sling Plate Icon
Sling Options
Lanyard Loop


Icon Thread Type
Outer Barrel Thread Type
Outer Barrel Thread Size
Inner Barrel Length

Magazine Specific

Magazine Type
Magazine BB Capacity
Approx. 25 Rounds
Magazine BB Fill Method
Speed Loader
Magazine BB Fill Location
Top, Bottom,
Magazine Gas Fill Location
Magazine Gas Type

Gas Gun Specific

Gas Can Icon
Gas Compatability
Gas Can Icon
Gas Recommendation
12g CO2 Bulb

Pistol Specific

Construction Icon
Slide Material
Icon Pistol Slide
Pistol Slide Type

Product Testing Data

Notepad Icon
Test Description
Notepad Icon
Tested Using
ASG Blaster 0.20g BBs & 12g CO2 Sparklet
Notepad Icon
Test Date

Detailed Power Tests

FPS, using 0.20g BB
Approx. 350fps, using 0.20g BB

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