KJ Works M1911A1 GBB Pistol; CO2 Version

KJ Works
Code: GC-0305
£169.99
  • Full metal construction
  • CO2 powered - INTENSE recoil
  • WW2 Era 1911 variant - Old school cool

If you like a sidearm that looks simple but grabs attention when you pull the trigger, the KJ Works M1911A1 GBB Pistol; CO2 Version will do exactly that! Boasting full metal construction and a Tokyo Marui-based internal build, the highlight of this 1911 platform is its incredible recoil, booming muzzle report and very impressive rapid-fire performance. Most green gas-powered 1911s suffer from a small gas reservoir restricting their consistency under rapid fire but we are happy to report that the KJ Works M1911A1 is exceptional in this regard.

Based on the real steel M1911A1, the 1911 variant issued during WW2, the Korean War and the Vietnam War, this is the variant to go for if you're running a retro primary. If you prefer a sidearm which is simple and effective with a side of old-school cool, the KJ Works M1911A1 GBB Pistol; CO2 Version is exactly that!

Full description

Description

If you're working on a WW2, Vietnam War or Korean War kit, the KJ Works M1911A1 GBB Pistol; CO2 Version should be your sidearm! This full-metal GBB pistol replicates the real steel M1911A1, the improved version of the original 1911 which served throughout the Second World War, the Korean War and the Vietnam War in the hands of US G.Is; the perfect compliment to a Thompson SMG, M16A1, M1 Garand or M1 Carbine based loadout.

Starting at the front of the slide we can find the front iron sight blade, which is a simple and fixed design meaning a no amount of bumping and shaking will have your sights walk out of alignment. The fixed iron sights are also period-accurate to the original M1911 and M1911A1, and given the age of the design of the real pistol, we are lucky we have sights at all! Another benefit of this type of sight is the low snag nature; the lack of adjustability means less to snag on and a smoother draw from your holster when it is sidearm time.

Due to the 1911's extremely instinctive design, holding this pistol gives you the feeling you have held it before, with the sights being easy to align and large enough to be easy to acquire, and all the controls falling right under your fingers, right where they should be.

Moving rearwards, we can find the mock ejection port, through which the outer barrel is visible with its realistic .45 ACP engraved markings. The outer barrel has mock rifling inside, meaning no threads for a tracer unit but extra realism when it comes to using the M1911A1 for photoshoots and as a movie prop. The rear of the slide features serrations on both sides to ensure the shooter has a solid grip when cocking the pistol, regardless of the weather conditions.

As we move rearwards we can find the slide release catch which has checkering on the upper surface to ensure it can be operated when wet or in adverse weather. Likewise, the magazine release is textured and is right where you expect to find it, well within reach of your thumb whilst firing, on the left side of the grip.

The front face of the trigger also includes checkering and is of a straight travel (aka straight back) design, similar to its descendant, the Hi-Capa. This allows for a consistent and accurate trigger pull, taking pure advantage of the light and short pull of a 1911 trigger. The safety lever can be found on the left side of the frame and sits comfortably under the shooter's thumb, perfect for cocked and locked carry. This safety lever is of a period-accurate design, with no extensions or other silly modern bits, and works just great the way it is.

On the rear of the pistol's frame, we have what is known as a beavertail grip safety; a hallmark feature of the 1911 allowing it to get away with a super short trigger pull and still be safe by disconnecting the trigger until the pistol is gripped fully and properly. The beavertail safety ensures the trigger cannot be inadvertently pressed when drawing from a holster, which can be quite a painful experience!

Just above the grip safety, we come to the hammer which is the appropriate "Spur" hammer design to match the real WW2 era 1911 pistol. The spur hammer allows you to cock the pistol by pulling the hammer back more easily, and while this isn't really useful for Airsoft it is still great fun to play with and makes the KJW M1911A1 a great movie prop.

The polymer Faux wooden grips have effective diamond checkering to ensure this pistol doesn't slip out of your hands during wet weather and are the correct shape and style for the old-school WW2/Korean War/Vietnam era 1911. At the bottom of the frame, behind the magazine well we have a lanyard loop, an extremely useful feature that allows you to retain your pistol even if it slips out of your holster. A lanyard loop can be the difference between losing your pistol after a long crawl in the woods and having that feeling of relief when you realise it has followed you!

On the inside, the KJ Works M1911A1 is reportedly fully Tokyo Marui compatible which is great news for those of us who cannot touch an Airsoft gun without upgrading it. Its CO2 power source provides intense recoil, far exceeding that of most GBB pistols on the market, helped along by its full metal construction. The grip is cut for CO2 magazines (we recommend staying in brand and going for KJW mags) but it can also accept KJW green gas magazines, giving you a second propellant option if the rapid-fire performance and meaty recoil of CO2 is a bit too much for you!

If you want to run a 1911 as a sidearm and want to rapid-fire like BBs are going out of fashion, a CO2-powered version is the best option. This, the KJ Works M1911A1 GBB Pistol; CO2 Version has absolutely shocking recoil and very impressive rapid-fire performance, even in cold weather. Whether you are looking for a retro sidearm or just want something simple, tasteful and practical, the KJ Works M1911A1 is a superb sidearm!

Features

  • Full metal construction
  • Mock rifling inside the outer barrel - Great for use as a prop or for photoshoots
  • WW2-Era 1911A1 replica - Perfect for WW2, Korean War or Vietnam War reenactment
  • Fixed open iron sights - Machined as part of the slide, just like the real M1911A1
  • Straight back trigger - Short and light trigger pull, fantastic for rapid-fire
  • Rear slide serrations - Great for wet weather use, plenty of traction
  • Checkered grips & hammer spring housing - Just like the real thing
  • Flat "spur" hammer - Designed into the real thing to allow for easy recocking
  • Beavertail grip safety - Prevents the pistol from being fired without being gripped correctly
  • Push button magazine release - On the left side of the grip, easy to reach with the thumb
  • Lanyard loop on the bottom of the grip - Attach a retention lanyard so your pistol never gets lost
  • Low profile manual safety - On the rear left of the frame, great for "cocked and locked" carry
  • CO2 Powered - Seriously intense recoil, impressive slide speed and great in colder weather
  • Based on the Tokyo Marui 1911 GBB - Potentially compatible with aftermarket upgrades
  • Requires 12g unthreaded CO2 Bulbs - Insert one into the base of the magazine
  • New to CO2? Check out our CO2 Maintenance Guide

Package Includes

  • KJ Works M1911A1 GBB Pistol; CO2 Version
  • 28rnd CO2 magazine
  • Barrel bushing tool

Specification

General

Weapon Construction External
Weapon Type
Pistol
Over 18 Only Icon
Over 18
Yes
Icon UKARA - United Kingdom Airsoft Retailer Association
Defence / UKARA Required
Yes, No,
FPS Icon
FPS (Feet Per Second), using 0.20g BB
Approx. 310fps ± 10%, using 0.20g BB
Site Legal Icon
Site Legal, using 0.20g BB
Yes
Screwdriver Icon
Pre-Built
Yes
Package
Included Items
  • Magazine
  • Barrel bushing tool
Skill Level Icon
User Skill Level
Starter, Regular Player,
Patrol Base - Warning Icon
Warnings
Lubrication is required

Weight and Dimension

Weight KG Icon
Weight (KG)
Approx. 0.7kg
Weapon Length Collapsed
Length (Collapsed)
21.7cm
Weapon Length Extended
Length (Extended)
21.7cm

Construction

Colour Wheel Greyscale
Primary Colour
Black
Colour Wheel Greyscale
Secondary Colour
Brown
Construction Icon
Construction
Steel grip screws, lanyard loop and pins. Alloy slide, frame, outer barrel and controls. High density polymer grip panels.
Weapon Construction External
External Construction
Polymer
Alloy
Steel
Gearbox Icon
Internal Construction
Polymer
Alloy
Aluminium
Steel

Weapon Specific

Power Source Icon
Powered By
CO2
Blowback Icon
Blowback
Gas Blowback
Weapon Platform
Pistol, 1911,
Magazine Style Icon
Magazine Style
Pistol Magazine, 1911,
Fire Select Icon
Fire Selector
PatrolBase | Fire Select Safe
Safe
Patrol Base | Fire Select - Semi Automatic
Semi Automatic
Weapon Safety Features Icon
Safety Features
Trigger Lock, Grip Safety,
Shooter Configuration Icon
Shooter Configuration
Right Handed
Weapon Configuration Icon
Weapon Configuration
Standard
Weapon Scale Icon
Weapon Scale
1:1
Suggested BB Weight
0.25g

Hop-Up

Hop-Up Unit Icon
Hop-Up Unit
Yes
Hop-Up Unit Adjuster Icon
Hop-Up Adjuster
Gear
Hop-Up Unit Location Icon
Hop-Up Location
On the outer barrel, accessible when the slide is removed and the pistol is in field stripped condition.

Furniture

Weapon Furniture Icon
Furniture
  • Rear Lanyard Mount Point
  • Textured Pistol Grip
  • Beavertail Safety
  • Flat "Spur" hammer
  • Open Iron Sights
Rail System Icon
Rail System
None
Sight Type Icon
Sight Type
Iron Sights , Open Iron Sight,
Sling Plate Icon
Sling Options
Lanyard Loop

Barrel

Outer Barrel Length (in)
5.1''
Inner Barrel Diameter
6.08mm
Inner Barrel Length
112mm

Magazine Specific

Magazine Type
Low Capacity , CO2,
Magazine BB Capacity
Approx. 28 Rounds
Magazine BB Fill Method
Speed Loader
Magazine BB Fill Location
Top, Front,
Magazine Gas Fill Location
Inside Shell
Magazine Gas Type
CO2

Gas Gun Specific

Gas Can Icon
Gas Compatability
Co2 Bulb
Gas Can Icon
Gas Recommendation
12g CO2 Bulb

Pistol Specific

Construction Icon
Slide Material
Alloy
Icon Pistol Slide
Pistol Slide Type
Standard

Product Testing Data

Notepad Icon
Test Description
310 FPS +/- 10%
Notepad Icon
Tested Using
0.2g ASG Blaster BBs & Swiss Arms 12g CO2
Notepad Icon
Test Date
13/06/2024

Size guide

Joule Charts

Special Instructions

These table can be used as a reference to see if the BB weight you are using will be over acceptable Joulage limits at some Airsoft Sites in the UK. To check if the weight can be used chrono your weapon using the BB you intend to use, and then compare it to the chart.

FPS, Power and Joule Limits can vary from site to site, so please get in touch with where you're going to play with in advance to avoid disappointment.

Suggested limits are based on Joulage Limit rules used Halo Mill: Proving Grounds, with a 350fps limit for Automatic Replicas, 400fps for Semi-Automatic Replicas, and 500fps for Bolt Action Replicas.

Tap the tabs below to open the relevant chart for your replica.

Suggested limits are based on Joulage Limit rules used Halo Mill: Proving Grounds, and is the equivalent of 350fps, using 0.20g BB resulting in an upper limit of 1.14j.

Velocity BB Weight (Grams)
FPS 0.20 0.25 0.28 0.30 0.32 0.36 0.40 0.43 0.45 0.50
250 0.58 0.73 0.81 0.87 0.93 1.05 1.16 1.25 1.31 1.45
260 0.63 0.79 0.88 0.94 1.00 1.13 1.26 1.35 1.41 1.57
270 0.68 0.85 0.95 1.02 1.08 1.22 1.35 1.46 1.52 1.69
280 0.73 0.91 1.02 1.09 1.17 1.31 1.46 1.57 1.64 1.82
290 0.78 0.98 1.09 1.17 1.25 1.41 1.56 1.68 1.76 1.95
300 0.84 1.05 1.17 1.25 1.34 1.51 1.67 1.80 1.88 2.09
310 0.89 1.12 1.25 1.34 1.43 1.61 1.79 1.92 2.01 2.23
320 0.95 1.19 1.33 1.43 1.52 1.71 1.90 2.05 2.14 2.38
325 0.98 1.23 1.37 1.47 1.57 1.77 1.96 2.11 2.21 2.45
328 1.00 1.25 1.40 1.50 1.60 1.80 2.00 2.15 2.25 2.50
330 1.01 1.26 1.42 1.52 1.62 1.82 2.02 2.18 2.28 2.53
335 1.04 1.30 1.46 1.56 1.67 1.88 2.09 2.24 2.35 2.61
340 1.07 1.34 1.50 1.61 1.72 1.93 2.15 2.31 2.42 2.68
345 1.11 1.38 1.55 1.66 1.77 1.99 2.21 2.38 2.49 2.76
350 1.14 1.42 1.59 1.71 1.82 2.05 2.28 2.45 2.56 2.85
355 1.17 1.46 1.64 1.76 1.87 2.11 2.34 2.52 2.63 2.93
360 1.20 1.51 1.69 1.81 1.93 2.17 2.41 2.59 2.71 3.01

Suggested limits are based on Joulage Limit rules used at Halo Mill: Proving Grounds, and is the equivalent of 400fps, using 0.20g BB resulting in an upper limit of 1.49j.

Velocity BB Weight (Grams)
FPS 0.20 0.25 0.28 0.30 0.32 0.36 0.40 0.43 0.45 0.50
250 0.58 0.73 0.81 0.87 0.93 1.05 1.16 1.25 1.31 1.45
260 0.63 0.79 0.88 0.94 1.00 1.13 1.26 1.35 1.41 1.57
270 0.68 0.85 0.95 1.02 1.08 1.22 1.35 1.46 1.52 1.69
280 0.73 0.91 1.02 1.09 1.17 1.31 1.46 1.57 1.64 1.82
290 0.78 0.98 1.09 1.17 1.25 1.41 1.56 1.68 1.76 1.95
300 0.84 1.05 1.17 1.25 1.34 1.51 1.67 1.80 1.88 2.09
310 0.89 1.12 1.25 1.34 1.43 1.61 1.79 1.92 2.01 2.23
320 0.95 1.19 1.33 1.43 1.52 1.71 1.90 2.05 2.14 2.38
330 1.01 1.26 1.42 1.52 1.62 1.82 2.02 2.18 2.28 2.53
340 1.07 1.34 1.50 1.61 1.72 1.93 2.15 2.31 2.42 2.68
350 1.14 1.42 1.59 1.71 1.82 2.05 2.28 2.45 2.56 2.85
360 1.20 1.51 1.69 1.81 1.93 2.17 2.41 2.59 2.71 3.01
370 1.27 1.59 1.78 1.91 2.03 2.29 2.54 2.73 2.86 3.18
380 1.34 1.68 1.88 2.01 2.15 2.41 2.68 2.88 3.02 3.35
390 1.41 1.77 1.98 2.12 2.26 2.54 2.83 3.04 3.18 3.53
400 1.49 1.86 2.08 2.23 2.38 2.68 2.97 3.20 3.34 3.72
410 1.56 1.95 2.19 2.34 2.50 2.81 3.12 3.36 3.51 3.90

Suggested limits are based on Joulage Limit rules used at Halo Mill: Proving Grounds, and is the equivalent of 500fps, using 0.20g BB resulting in an upper limit of 2.32j.

Velocity BB Weight (Grams)
FPS 0.20 0.25 0.28 0.30 0.32 0.36 0.40 0.43 0.45 0.50
250 0.58 0.73 0.81 0.87 0.93 1.05 1.16 1.25 1.31 1.45
260 0.63 0.79 0.88 0.94 1.00 1.13 1.26 1.35 1.41 1.57
270 0.68 0.85 0.95 1.02 1.08 1.22 1.35 1.46 1.52 1.69
280 0.73 0.91 1.02 1.09 1.17 1.31 1.46 1.57 1.64 1.82
290 0.78 0.98 1.09 1.17 1.25 1.41 1.56 1.68 1.76 1.95
300 0.84 1.05 1.17 1.25 1.34 1.51 1.67 1.80 1.88 2.09
310 0.89 1.12 1.25 1.34 1.43 1.61 1.79 1.92 2.01 2.23
320 0.95 1.19 1.33 1.43 1.52 1.71 1.90 2.05 2.14 2.38
330 1.01 1.26 1.42 1.52 1.62 1.82 2.02 2.18 2.28 2.53
340 1.07 1.34 1.50 1.61 1.72 1.93 2.15 2.31 2.42 2.68
350 1.14 1.42 1.59 1.71 1.82 2.05 2.28 2.45 2.56 2.85
360 1.20 1.51 1.69 1.81 1.93 2.17 2.41 2.59 2.71 3.01
370 1.27 1.59 1.78 1.91 2.03 2.29 2.54 2.73 2.86 3.18
380 1.34 1.68 1.88 2.01 2.15 2.41 2.68 2.88 3.02 3.35
390 1.41 1.77 1.98 2.12 2.26 2.54 2.83 3.04 3.18 3.53
400 1.49 1.86 2.08 2.23 2.38 2.68 2.97 3.20 3.34 3.72
410 1.56 1.95 2.19 2.34 2.50 2.81 3.12 3.36 3.51 3.90
420 1.64 2.05 2.29 2.46 2.62 2.95 3.28 3.52 3.69 4.10
430 1.72 2.15 2.40 2.58 2.75 3.09 3.44 3.69 3.86 4.29
440 1.80 2.25 2.52 2.70 2.88 3.24 3.60 3.87 4.05 4.50
450 1.88 2.35 2.63 2.82 3.01 3.39 3.76 4.04 4.23 4.70
460 1.97 2.46 2.75 2.95 3.15 3.54 3.93 4.23 4.42 4.91
470 2.05 2.57 2.87 3.08 3.28 3.69 4.10 4.41 4.62 5.13
480 2.14 2.68 3.00 3.21 3.42 3.85 4.28 4.60 4.82 5.35
490 2.23 2.79 3.12 3.35 3.57 4.02 4.46 4.80 5.02 5.58
500 2.32 2.90 3.25 3.48 3.72 4.18 4.65 4.99 5.23 5.81
510 2.42 3.02 3.38 3.62 3.87 4.35 4.83 5.20 5.44 6.04