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AIRSOFTCON 2026 - October 17, 2026
Home » Airsoft Guns » Airsoft Electric Rifles

Cybergun x Colt Sportsline M4 AEG Rifle w/ G3 Micro-Switch Gearbox
(Model: URX4 8.5" / Black / Gun Only)

ID: 97915 (AEG-CG-180232-US)
STAEG370CMCBC
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Optic not included
Cybergun / Spartan Mil/LEColt

$170.00

Airsoft Authority Since 2001
Serving enthusiasts for over 25 years
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Buy with confidence - 90 day warranty
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Free shipping over $149 in lower 48 states
MAP ProtectedExempt From Coupons
The manufacturer of this product enforces a strict minimum advertised price (MAP) policy which excludes this product from any additional discount coupon codes. This item, however, may qualify for free shipping.
Canada Export CompliantCanadaExport Compliant
This gun has a muzzle velocity rating (FPS) between 366 and 500, and is compliant for export to Canada.
Free ShippingNo Coupon Required
Free shipping within lower 48 US states, no coupon code needed!
Order Today Receive as soon as Fri Jul. 24 with Free Shipping
Model Options:
Baby PDW SD 3.5Baby PDW SD 3.5"
Baby SD 3.5Baby SD 3.5"
Block 3 10.5Block 3 10.5"
Block 3 9.5Block 3 9.5"
Daniel Defense 9 MK18Daniel Defense 9" MK18
Delta MiniDelta Mini
Keymod 10Keymod 10"
Keymod 8Keymod 8"
M4 CommandoM4 Commando
M4 Commando w/ Crane StockM4 Commando w/ Crane Stock
M4 SBR w/ 5 QuadrailM4 SBR w/ 5" Quadrail
M4 SBR w/ 8 QuadrailM4 SBR w/ 8" Quadrail
M4A1M4A1
M4A1 w/ Crane StockM4A1 w/ Crane Stock
Rainbow 10.5Rainbow 10.5"
Rainbow 14.5Rainbow 14.5"
RangerRanger
SD PDW-MSD PDW-M
SD PDW-SSD PDW-S
Silent Ops 7Silent Ops 7"
Silent Ops 9Silent Ops 9"
URG-1 11.5URG-1 11.5"
URG-1 14.5URG-1 14.5"
URX 12URX 12"
URX 8URX 8"
URX3 8URX3 8"
URX4 10.75URX4 10.75"
URX4 11.5URX4 11.5"
URX4 14.5URX4 14.5"
URX4 8.5URX4 8.5"
URX4 9.5URX4 9.5"
URX4 PDW SDURX4 PDW SD
URX4 PDW-S SDURX4 PDW-S SD
URX4 PistolURX4 Pistol
Options:
Black
Options:
Gun Only

Description

Specs

Reviews

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Product Description

Features

  • Colt licensed laser engraved trademarks
  • S&T Gen 3 Lipo ready gearbox with micro-switch trigger and quick change spring guide
  • Integrated MOSFET for improved power usage, motor performance and trigger response
  • High strength nylon fiber reinforced polymer receiver, stock, buffer tube, grip
  • Flat top receiver allows mounting of optics or other accessories
  • Adjustable 6 position SOPMOD style stock
  • Metal 300rd high-cap magazine
  • Easy-to-handle URX4 M-LOK handguard features a full-length picatinny top rail and M-LOK slots
  • QD sling swivel mounts on either side of the handguard and stock
  • Includes 3x M-LOK rail segments
The Newly improved G3 gearbox developed under collaboration between Matrix and S&T offers the same features found in the G2 series such as a microswitch trigger, improved steel gears, full steel teeth piston, and aluminum cylinder. New to the G3 series gearboxes is an improved QD spring system which makes it even easier to swap to different strength springs without disassembly. The inline MOSFET features over discharge protection and the electric trigger features a magnetic sensor for improved responsiveness.

Patterned after the original ArmaLite AR-15, Colt rifles have been in the hands of the US Military as well as many civilian enthusiasts since the adoption of the M16 combat rifle. Through years of hard use and first hand feedback to improve and evolve the weapon platform, the Colt M4 and M16 has risen to be one of the most popular and trusted combat rifles around the world.

Manufacturer: Cybergun x Colt

FPS Range: 400-430

143 Customer Reviews

(Write a review)

by Josiah W. on 12/02/2025
"This gun has been nothing but fantastic, great for indor arenas and extremely useful outdoors aswell.
by Terence B. on 09/18/2025
"Cybergun Licensed Colt Sportsline M4 AEG Rifle w/ G3 Micro-Switch Gearbox (Model: Black / Keymod 10")

Works well. Put a 11.1v LiPo and a 6.03 TBB on it and it'll beam the BBs across the field. Works flawlessly. Good range. Shooting with .30s, I'm hitting around 350-360fps. Accurate. Added a new motor and this thing just works.
by Jonathan V. on 06/29/2025
"(MODEL: M4 SBR W/ 8" QUADRAIL / TAN) - Great entry level weapon for air softers. External parts are pretty solid with the quality of material. Internal components may be on the cheaper side but still durable enough to last some time before attempting upgrades. Would recommend getting as a first timer or as a second back up weapon.

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Cybergun / Spartan Mil/LEColt

About Cybergun / Spartan Mil/LE

Cybergun is the world leader in designing and distributing replica dummy weapons for video game aficionados, sport or outdoor shooting, and collectors.