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GHK Colt Licensed M4A1 V2 RIS Gas Blowback Airsoft Rifle by Cybergun (Length: 14.5" / Green Gas)

ID: 78541 (GR-GHK-M4-145-COLT)
5.0 stars, based on 6 reviews
GHK Colt Licensed M4A1 V2 RIS Gas Blowback Airsoft Rifle by Cybergun (Length: 14.5 / Green Gas)
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Optic not included
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Canada Export CompliantCanadaExport Compliant
This gun has a muzzle velocity rating (FPS) between 366 and 500, and is compliant for export to Canada.
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Free shipping within lower 48 US states, no coupon code needed!


  • Full metal upper and lower receiver with stamped Colt trademarks
  • Metal barrel assembly with fixed triangular front sight
  • Metal RIS handguard allows for easy addition of any 20mm accessories
  • Flat top receiver makes mounting optics or other accessories easy
  • Adjustable LE style stock and polymer pistol grip
  • CNC bolt carrier group with negative pressure blowback system. CNC process with heat treatment. Harder material and smooth performance
  • Realistic fire controls with improved bolt locking lever
  • Lighter weight magazine design reduces weight by 35% compared to the old 1st generation magazines

Manufacturer: GHK / Licensed by Colt

FPS: 400

Color: 14.5"

Size: Green Gas


Length: 780mm - 840mm, Adjustable
Weight: 2890
Inner Barrel: ~370mm
Magazine Capacity: 40rd GHK M4 Magazine
Thread Direction: 14mm Negative
Gas Type: Green Gas
Fire Modes: Semi / Full-Auto, Safety
Package Includes: Gun, Magazine, Manual
Hopup: Yes, Adjustable

About GHK

Established in Taiwan in 2008, GHK began as the leading manufacturer of AK style gas blowback rifles. In the intervening years GHK has grown to become one of the most highly regarded GBBR manufacturers in the industry.

6 Customer Reviews

(Write a review)

by Christopher T. on 03/22/2021
"I have had the gun for a few months now and it has not let me down at all. The gun build is very high quality and it looks very nice. I haven't had any problems with it so far and even when using green gas in freezing temperatures it functioned perfectly fine even on full auto.

Pros -
High-Quality build
Nice kick
Easily upgradable
Great gas usage (3 full magazines worth of bbs on 1 gas fill)

Cons -
Didn't come with a replacement metal flash hider
To get to the hop-up you have to remove the bottom rail and it can get tedious

Overall the gun is very fun and well worth the price tag on it.
by Michael P. on 02/07/2021
"Got this in a DAY before the mk18 version came to evike but i must say this rifle is so fun to play with. apart from the accuracy not being the best its perfect. When i first unpackaged it the rifle was very stiff. Like, Everything was stiff. Almost to the point that i couldn't put the mag in until i lubricated the mag and magwell. Mine also didn't come in the nice, stanard colt v2 black box with the rifle on it it instead came in a large blue box with "Colt" on it. not a con just being picky. Definately worth the price.
by Botao Q. on 07/30/2020
"Nice rifle, nice build, full metal part make me addictive, the parts are little tight, some silicone oil will make it perfect. This rifle will never let u down, if you like it just buy it, definitely worth it

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