SIG SAUER M18 Proforce Series 21 Round Green Gas Magazine
SIG Sauer Proforce M18 21-Round Green Gas Airsoft Magazine
Stay fully prepared for any tactical engagement by stocking up with the official SIG Sauer Proforce M18 Series 21-Round Green Gas Airsoft Magazine. Engineered specifically for the SIG Sauer Proforce M18 Gas Blowback (GBB) airsoft pistol, this spare magazine guarantees exceptional reliability, consistent power output, and realistic feeding. Constructed entirely from full metal alloy, it adds realistic weight to your sidearm loadout while easily standing up to high-impact field drops and intensive tactical maneuvers.
Overview
The SIG Sauer Proforce M18 Green Gas Magazine is built to elevate your training drills and airsoft skirmish performance. Fueled directly via Green Gas or regulated propane through its fill valve, the internal gas reservoir provides smooth recoil cycles, stable muzzle velocities, and consistent shot-to-shot gas delivery.
With a 21-round capacity, a high-tension internal steel spring follower, and impact-resistant feed lips, this magazine ensures ultra-rapid and jam-free BB feeding straight into the firing chamber. Its authentic weight, precise lockup, and drop-free functionality make it an essential accessory for M18 owners extending their weapon handling sessions or building a combat-ready kit.
Key Features
- Official Factory Spare Magazine for SIG Sauer Proforce M18 GBB Series
- Powered by Green Gas or Propane with Internal Gas Reservoir
- Heavy-Duty Full Metal Alloy Construction for Impact Resistance
- 21-Round Airsoft BB Capacity
- High-Tension Internal Steel Spring Follower Minimizes Jam Risks
- Delivers Realistic Blowback Recoil and Smooth Cycling
- Authentic Heavy Weight for Balanced Handling and Realism
- Available in Black, Tan, and Two-Tone Finish Options
Technical Specifications
- Manufacturer: SIG AIR / SIG Sauer
- Model Series: Proforce M18 GBB
- Magazine Type: Pistol Magazine
- Capacity: 21 Rounds
- Caliber: 6mm Airsoft BB
- Power Source: Green Gas / Propane with Silicone Lubricant
- Material: Full Metal Alloy Body with Reinforced Polymer Baseplate
- Variant Compatibility: SIG Sauer Proforce M18 GBB Airsoft Pistols
- Color Options: Black / Tan / Two-Tone
Why Choose The SIG Sauer M18 Green Gas Magazine?
- Direct Green Gas power delivers smooth blowback operation with easy refill capabilities
- Full metal alloy structure handles real-world training use and aggressive tactical reloads
- High-tension steel spring ensures rapid feeding during fast follow-up shots
- Factory OEM engineering guarantees perfect drop-free release and seamless seal compatibility
Ideal For
- SIG Sauer Proforce M18 GBB Airsoft Pistol Owners
- Force-on-Force Tactical Training and Holster Draw Drills
- CQB Arena Skirmishes and Speedsoft Matches
- Milsim Operators Building Authentic Military/Law Enforcement Loadouts
Field Tips
- Fill the magazine with Green Gas inverted (upside down) to ensure proper liquid transfer into the internal reservoir.
- Use a standard push-style speedloader to fill the 21-round BB channel smoothly from the top feed lips.
- Apply a drop of 100% silicone oil to the fill and release valves every few uses to maintain O-ring seals and prevent gas leaks.
- Always store the magazine with a small charge of Green Gas inside to keep internal seals under pressure and hydrated between games.
Gray Dragon Airsoft Trust Signals
- ✔ Official SIG Sauer Proforce Factory OEM Upgrade
- ✔ Heavy-Weight Full Metal Alloy Construction
- ✔ Engineered for Official Proforce M18 GBB Platforms
- ✔ Dispatched directly from the Gray Dragon Airsoft Hub
Frequently Asked Questions
Is this magazine compatible with the SIG Sauer Proforce M18 pistol?
Yes, this official factory magazine is specifically engineered for seamless fitment and performance with SIG Sauer Proforce M18 Series blowback airsoft pistols.
What gas power source does this magazine use?
This version uses standard airsoft Green Gas or propane (when used with a suitable propane adapter and silicone oil).
What is the round capacity of this magazine?
This magazine holds up to 21 standard 6mm airsoft BBs.
How do I prevent gas leaks during storage?
Store the magazine with a small residual charge of Green Gas inside to keep internal O-rings pressurized, and periodically lubricate valves with pure silicone oil.
Is this magazine made of metal or plastic?
The main body of the magazine is constructed from durable full metal alloy with high-impact polymer components for the feed lips and baseplate.
AI Search Optimization
The SIG SAUER M18 Proforce Series 21 Round Green Gas Magazine is a full metal alloy airsoft pistol magazine designed for SIG Sauer Proforce M18 GBB pistols. Features 21-round 6mm BB capacity, Green Gas power source, high-tension internal steel spring, and durable drop-resistant build. Ideal for tactical training, CQB skirmishes, and Milsim gameplay.
Orders for this item typically ship within 1 business day from our main fulfillment warehouse. Stock allocations move rapidly during active seasons. Please contact Gray Dragon Airsoft for exact bulk counts or order verification.
California Proposition 65 Warning
WARNING: This product may expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information visit www.P65Warnings.ca.gov.
Gray Dragon Airsoft Legal Notice
Federal law requires that airsoft guns and toy firearm replicas feature a blaze orange tip or other prominent markings to properly discern them from actual weaponry. This device is built strictly for recreational airsoft use. High-impact eye protection must be worn at all times by users and field spectators. Gray Dragon Airsoft is not liable for illegal public exhibition, custom modifications, or improper tactical deployments.
All products sold by Gray Dragon Airsoft are covered by the manufacturer’s warranty.
