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Guns Modify MWS GBBR Airsoft M4 (GEI Rail with Blank Receiver, Level 2, 14.5 inch)

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  • Latest URG-I Style Rifle
  • Operates Using the MWS System
  • 35 Round Gas Magazine
  • Snappy Recoil Impulse
  • Highly Upgradable
  • Featuring Guns Modify Parts Inside
  • Magazines Compatible with Tokyo Marui M4 MWS Gas Airsoft Magazines
  • Includes Limited Edition Gun Mat

This product is only compatible with gas designed specifically for Airsoft guns. Do not use lighter fluid or butane gas, as that will cause permanent damage.


The URG-I stands for Upper Receiver Group Improved is an improved upper receiver group currently used by many special units in the United States military. Designed to replace guns like the MK18, the URG-I aims to modernize many of the weapon systems currently in use with lightweight M-LOK rails, an improved charging handle, and an updated barrel.

The airsoft version as we have here from Guns Modify seems to be very similar to other offerings patterned similarly. However, while the externals seem to be yet another URG-I rifle, it's the internals that makes this rifle truly shine.

Internally, the rifle runs on the Tokyo Marui M4 MWS system making it incredibly reliable and consistent, not to mention exceptionally gas efficient. This also means that the magazines are compatible with other third-party or first-party ones.

Furthermore, being from Guns Modify, this rifle is already pre-upgraded out of the box as it uses parts from Guns Modify. However, if you want to further upgrade them, you have access to the wide variety of upgrade parts available to any other MWS user.

Check out more Airsoft Guns

Magazine Compatibility:

  • Tokyo Marui M4 MWS Gas Airsoft Magazines
  • Tokyo Marui M4 MWS Compatible Gas Airsoft Magazines


  • x1 Guns Modify Complete URG-I with GEI Receiver MWS GBB Rifle (Level 2, 14.5 inch)
  • x1 35 Round Magazine

*Limited edition gun mat only comes with a set amount of guns. As soon as the mats are sold out, they will no longer be included*

BrandGuns Modify
Originating ArmoryGEISSELE
Replica TypeRIFLE
Capacity (rds)30
Power (fps)330
Power SourceGreen Gas / Top Gas
Shooting ModeSemi Auto / Full Auto
Net Weight (kg)2.45
Length (mm)780.0
Barrel Thread TypeCCW
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