The Heckler & Koch HK M110 A1 S-AEG is a precision-focused airsoft replica modeled closely after the U.S. military’s designated marksman rifle. Built with a full-metal construction and engineered for durability, this platform is designed for players seeking long-range consistency, stable firing behavior, and compatibility with modern accessories. Its robust external build delivers a realistic form factor while maintaining structural rigidity essential for precision performance.

At the core of the M110 A1 is a 455 mm precision inner barrel with a 6.03 mm diameter, optimized for guiding 6 mm BBs with minimal deviation. Combined with an adjustable hop-up, the rifle ensures stable trajectory control over extended distances. The muzzle is threaded with a 14 mm CCW interface, allowing the attachment of tracer units or suppressor-style extensions.

The rifle’s control layout mirrors the real platform, featuring an ambidextrous fire selector, bolt catch, and magazine release on both sides of the receiver. The inclusion of a full-length Picatinny top rail and M-LOK fore-end slots supports a wide array of optics, grips, and illumination tools. A removable 45° offset iron sight is installed out of the box, enabling rapid transitions when magnified optics are mounted.

Powered by an electric gearbox system, the M110 A1 delivers consistent cycling, suitable for semi-automatic engagements. Its 100-round magazine provides extended operational capacity without compromising realism. The 5-position collapsible stock accommodates different battery types used by Umarex, including C, D, and E variants with LiPo monitoring.

Measuring 940 mm in length and weighing 3500 g, the rifle has a substantial footprint that assists with recoil stability and supported firing positions. Recommended BB weights between 0.28 g and 0.30 g help maximize accuracy and range. The HK M110 A1 is a refined platform tailored for players who prioritize precision, reliability, and authentic ergonomics in designated-marksman roles.