Umarex HK UMP .45 Gas Blowback SMG – Officially Licensed Heckler & Koch Airsoft GBB Rifle

HK UMP45 Gas Blowback SMG by Umarex

The Umarex HK UMP .45 Gas Blowback SMG is an officially licensed Heckler & Koch airsoft replica that delivers realistic handling, strong recoil, and immersive gas blowback performance. Designed to mirror the real UMP platform, this GBB SMG features a durable polymer body with authentic markings, a folding stock, and a compact profile ideal for CQB and field play. The gas blowback system provides crisp cycling and realistic operation, making it an excellent choice for milsim players and enthusiasts who value realism and responsive performance. With its ergonomic controls, reliable magazine system, and iconic UMP styling, this SMG stands out as a high-impact primary for close-quarters and tactical airsoft scenarios.

Features:

• Fully licensed by Heckler & Koch
• Compact design; great as a sidearm for snipers and MG crews or as a primary weapon
• Realistic, hard-kick blowback
• High strength nylon-reinforced polymer
• Side folding nylon-reinforced polymer stock
• Adjustable rear sight
• Heavyweight nylon-reinforced polymer magazine
• 20mm accessory rails
• Top rail for optics
• Ambidextrous selector switch, and mag release