H&K UMP9 Gas Magazine – 20 Rounds

The H&K UMP9 gas magazine is a genuine replacement or spare magazine for Umarex VFC H&K UMP9 airsoft gas blowback platforms. Whether you’re running a primary SMG, secondary support weapon, or upgrading from stock mags, this 20-round magazine offers dependable gas efficiency and feed reliability across indoor and outdoor UK sites.

Key Features

• 20-round capacity – lightweight and ergonomic, ideal for CQB and woodland skirmish engagements where magazine changes are frequent.
• H&K UMP9 platform compatibility – engineered by VFC for the Umarex range, ensuring perfect fitment and secure retention.
• Gas magazine design – reliable performance in UK climate conditions and compatible with standard airsoft green gas, black gas, and HFC propellants.
• Authentic H&K markings – official trademarks and realistic construction for immersive milsim loadouts.
• Spare magazine investment – fast reload cycling during skirmish play without downtime searching for ammunition.

Real-World Use Cases

• CQB indoor sites: The 20-round capacity suits close-quarters play, where rapid magazine changes and compact handling are essential. Pair with 0.20 g or 0.25 g BBs for consistent performance in heated indoor battles.
• UK woodland skirmish: As a secondary SMG or primary support weapon, this magazine ensures you stay in the fight across typical UK woodland sites without carrying excessive spare ammo.
• Milsim primary or secondary: Authentic H&K markings and gas-fed design make this magazine a natural fit for realistic military simulation loadouts, whether you’re running a primary rifle with SMG backup or a dedicated support role.

Technical Specifications

• Product Type: Gas magazine
• Capacity: 20 rounds
• Compatibility: Umarex VFC H&K UMP9 series
• Brand: Umarex / VFC

Compatibility & Upgrades

This magazine is designed exclusively for Umarex VFC H&K UMP9 platforms. It is not compatible with Tokyo Marui or other manufacturer variants. Pair with recommended green gas, black gas, or HFC propellants for optimal performance. Magazine maintenance – regular cleaning of feed lips and gas seal components – extends longevity and ensures reliable feeding during skirmish sessions.

UK Legal & Site Notes

This is a magazine accessory for a gas blowback airsoft replica. Your replica itself (if a RIF) requires UKARA registration or a valid section 5 VCRA defence. Always confirm your site’s magazine capacity limits and FPS / joule restrictions before play. Gas magazines perform best between 10–20 °C; colder UK winters may reduce gas pressure and shot consistency.

Order from Airsoftdirect

Stock up on spare H&K UMP9 gas magazines to maximise your skirmish sessions. Currently out of stock, but we’re restocking regularly. Sign up for stock alerts or explore compatible gas SMG magazines and propellants to keep your loadout battle-ready.