Airsoft Guns Buyers Guide
Airsoft GI small logo
Customer Service: 1.909.869.0671

Guns Modify EVO Steel Valve Blocker Set for TM/GM/MWS M4 GBB Magazines (Black)

[73913 / GM-GM0501]
$20.90 $18.81
Write Review ❤ Add to Wishlist
ADD TO CART
Daily Shocker Deal
Orders over $179 qualify for free shipping
Free Shipping for orders over $179 No Coupon needed
New to airsoft? Here are some safety tips for airsoft guns that we recommend following.

Guns Modify EVO Steel Valve Blocker Set for TM/GM/MWS M4 GBB Magazines (Black)

Specifications

  • Brand: Guns Modify Airsoft
  • Material: Steel
  • Compatibility: TM and GM MWS M4 GBBR
  • Color: Black

Features

  • Constructed from precision machined steel for maximum durability and reliability
  • Enhances gas retention and valve stability for consistent performance
  • Reinforced design minimizes leaks and improves pressure regulation under sustained use
  • Direct drop-in installation fits TM and GM MWS M4 gas blowback magazines
  • Corrosion-resistant black finish for long-lasting protection and performance
  • Ideal upgrade for competitive players and field use alike
  • Resists deformation and wear through repeated gas cycles
  • Manufactured by Guns Modify Airsoft for precision fitment and professional-grade quality

Precision built for performance and reliability

The Guns Modify EVO Steel Valve Blocker Set for TM, GM, and MWS M4 GBB magazines is a professional-grade internal upgrade engineered to enhance gas efficiency, pressure consistency, and long-term durability. Constructed from high-quality machined steel, this component set delivers superior strength and precision compared to standard factory parts. The reinforced design stabilizes gas flow within the magazine, reducing leaks and maintaining consistent pressure regulation even during rapid or sustained firing. Each piece is CNC machined to exact tolerances, ensuring a secure, leak-free fit for both TM and GM MWS M4 gas blowback magazines. The result is smoother operation, more consistent FPS, and greater reliability in demanding environments.

Enhanced gas efficiency and long-term durability

Designed for drop-in installation, the EVO Steel Valve Blocker Set requires no modification, making it a straightforward yet powerful performance upgrade. Its high-strength steel construction resists deformation and wear, maintaining optimal functionality through thousands of gas refills and discharges. The black finish provides corrosion resistance and a professional look, ensuring the internal components perform smoothly and consistently across all weather conditions. Ideal for competitive shooters and field players alike, this valve blocker set helps extend magazine lifespan while improving stability and efficiency in every cycle.

Professional-grade Guns Modify craftsmanship

Manufactured by Guns Modify Airsoft, a leader in high-performance airsoft components, the EVO Steel Valve Blocker Set reflects meticulous engineering and superior quality control. Every detail has been designed to maximize performance and reliability for the Tokyo Marui and GM MWS platforms. By reinforcing the valve system and optimizing gas retention, this upgrade gives players a tangible edge in both consistency and endurance. Whether you’re refining a competition build or increasing field dependability, the EVO Steel Valve Blocker Set represents a premium solution for players who demand flawless gas system operation and lasting performance from their M4 GBB magazines.

Specifications
Manufacturer: Guns Modify
No reviews | Write a Review
Search Tags: upgrade oem replacement oem mws gbb gbbr
Copyright © 2025 Airsoft GI
Disclaimer:

All airsoft guns are required to have the tip (1/4 inch) of the barrel permanently colored in blaze orange. No person may openly display or expose any imitation firearm (replica firearm), in a public place. The term "public place" means an area open to the public or exposed to public view and includes streets, sidewalks, bridges, alleys, plazas, parks, driveways, parking lots, automobiles, whether moving or not, and buildings open to the general public, including those that serve food or drink, or provide entertainment, and the doorways and entrances to buildings or dwellings and the grounds enclosing them.

Any person who changes, alters, removes, or obliterates any coloration or markings that are required for by any applicable state or federal law or regulation, for any imitation firearm (replica firearm), or device in any way that makes the imitation firearm (replica firearm) or device look more like a firearm is guilty of violating the state or federal law.

By accessing the Site, you certify that you are older than 18 years of age or the age of majority where you live, whichever is older; that you are the owner of any credit card used to purchase on items on the Site; that you are familiar with all local laws in your area affecting your legal right to access airsoft products; that any products you buy are for your own private enjoyment and that you will NEVER share these products with a minor in ANY WAY.