MBX Extreme ULTRA MAX Spring 140mm

MBX Extreme Ultra Max Spring 140mm — Competition-Grade Magazine Spring for Maximum Performance

When every round counts, your magazine spring shouldn't be the weak link. The MBX Extreme Ultra Max Spring is engineered specifically for 140mm competition magazines, delivering the consistent tension and reliable feeding serious competitors demand at every stage.

Built for Competition:

Designed from the ground up for high-volume competitive shooting, the Ultra Max Spring maintains optimal tension throughout its service life, ensuring consistent magazine function from the first round to the last. Whether you're running a tight stage or pushing through a long match day, this spring performs when it matters most.

Key Features:

• Competition-Optimized Tension — Precisely calibrated spring weight ensures reliable feeding and proper follower movement throughout the full magazine capacity
• 140mm Configuration — Engineered specifically for 140mm magazine tubes for a perfect fit
• Durable Construction — Premium materials resist fatigue and maintain consistent performance over thousands of rounds
• Drop-In Installation — Simple replacement requiring no special tools or gunsmithing
• MBX Quality — Backed by MBX's reputation for competition-proven magazine components trusted by top-level shooters worldwide

Who This Spring Is For:

• USPSA and IPSC competitors running 140mm magazine divisions
• High-volume shooters experiencing inconsistent feeding or follower issues
• Competitors looking to maximize magazine reliability and round count
• Shooters upgrading or rebuilding MBX magazine internals for peak performance

⚠️ Compatibility Notice:

These springs are NOT compatible with Glock or SIG Ultra Max followers. Please verify your follower type before ordering to ensure proper fit and function. If you are running Glock or SIG Ultra Max followers, please refer to the appropriate MBX spring designed for those configurations.

Performance You Can Count On: