Elite Force UMP GBBR Magazine Rebuild Kit – Gas Valve & Seal Kit for HK UMP GBB Magazines

Gas blowback mags are awesome… until they start leaking. If you’ve been around airsoft long enough, you know it’s not a matter of if, but when. When your Elite Force / HK UMP GBBR magazine starts bleeding gas, this rebuild kit is the smart fix.

The Elite Force UMP GBBR Magazine Rebuild Kit gives you the essential internal components needed to bring a tired or leaky magazine back to life—without dropping full replacement-mag money. It’s a cost-effective, field-tested solution that keeps your UMP mags running hard and sealing tight.

Whether you’re a hands-on tech or a player who just hates throwing gear away, this kit belongs in your toolbox. A quick rebuild now can save you frustration, downtime, and cash later—something every experienced GBB player understands.

Features

• Designed specifically for Elite Force / HK UMP GBBR magazines
• Restores leaky or malfunctioning gas magazines
• More affordable than replacing a complete magazine
• Ideal for preventative maintenance or emergency repairs
• Perfect spare kit for serious GBB users and techs
• Backed by Elite Force / Umarex OEM compatibility

Specifications

Material: Mixed metal and rubber components (valves and sealing elements)