CYMA x SP System 40-Round Polymer Magazine for CGS & MWS GBB Rifles

Quick Specs

• Capacity: 40 Rounds

• Platform Compatibility: EMG / CYMA CGS & Tokyo Marui MWS

• Construction: Polymer shell with metal alloy upper

• Gas Route: Pre-installed 70° gas route

• Gas Valve: Steel high-flow valve

• Internal Tank: CNC 6061 aluminum

• Manufacturer: CYMA / SP System

Overview

The CYMA x SP System 40-Round Gas Blowback Magazine is engineered for players who demand reliable feeding, strong gas efficiency, and consistent performance from their GBB rifles. Designed specifically for CGS and Tokyo Marui MWS–spec platforms, this magazine delivers enhanced gas flow, durable internals, and dependable cycling in a wide range of field conditions.

Built for both competitive gameplay and realism-focused milsim loadouts, it offers the ideal balance of capacity, power delivery, and durability.

Key Features

• Reinforced polymer shell with metal alloy upper for reduced weight and long-term durability

• Enhanced magazine feed lip for smoother, more reliable BB feeding

• Pre-installed 70° gas route optimized for consistent performance across varying temperatures

• Steel high-flow gas valve for increased gas output and stronger recoil impulse

• Steel valve hit pin designed to withstand repeated bolt impact

• Precision CNC-machined 6061 aluminum gas tank for consistent pressure retention

• Realistic 40-round capacity for immersive gas blowback gameplay

Performance & Gas Efficiency

This magazine is tuned for stable FPS, reliable cycling, and improved recoil response. The high-flow gas valve and optimized gas route work together to maximize gas transfer efficiency, ensuring smooth bolt movement and minimal cooldown during rapid firing. Whether running semi-auto drills or sustained engagements, the magazine maintains dependable output shot after shot.

The 70-degree gas route offers flexibility across different temperatures, making this magazine a solid choice for both indoor and outdoor fields.

Build Quality & Durability

CYMA and SP System focused heavily on structural integrity. The polymer body absorbs impacts during reloads, while the metal alloy upper and steel internals handle high-stress components where it matters most. The CNC-machined aluminum gas tank adds strength without excessive weight, ensuring long service life even under heavy use.

Compatibility & Fitment

• Fully compatible with EMG / CYMA CGS gas blowback rifles

• Fully compatible with Tokyo Marui MWS–spec GBB platforms

• Ideal for stock rifles or upgraded builds using MWS-compatible components

Ideal For

• Gas blowback rifle users seeking reliable feeding and gas efficiency

• Milsim players wanting realistic capacity with dependable performance

• CGS and MWS owners looking for a durable, field-ready spare magazine

• Players upgrading from standard magazines for better consistency

Why Choose CYMA x SP System?

CYMA and SP System deliver a magazine that prioritizes performance where it counts—gas flow, feeding reliability, and internal durability. With upgraded internals, reinforced construction, and proven platform compatibility, this magazine is a dependable choice for serious GBBR players.

Important Notice: Modifying Green Gas or CO₂ magazines to accept aftermarket HPA fittings or valves will void all warranties due to the risk of damage from high pressure and misuse.