Design and Development
The OM-50 Nemesis, a remarkable firearm crafted by James Owens and Chris Movigliatti, emerged as a testament to innovative design and engineering. This precision rifle, born from the minds of former U.S. Marine Corps officers, was designed to cater to the needs of military and law enforcement personnel for precise anti-material rifle (AMR) engagements. Its inception was swift, with the first prototype being produced just three months after the design phase commenced. The rifle was officially introduced by Swiss company AMSD in 2003, bearing the name OM 50, where OM stands for the designers and 50 denotes the caliber. The Nemesis part of the name is a nod to the Greek goddess of revenge, reflecting the weapon’s formidable capabilities.
Modularity and Versatility
The OM-50 Nemesis is renowned for its modular design, allowing for the interchangeability of different barrel lengths ranging from 381mm to 838mm. This feature makes the rifle adaptable to various scenarios, from urban warfare to long-range precision shooting. The barrel is float-mounted, ensuring minimal movement and enhancing accuracy. The rifle is crafted from aviation-grade aluminum, contributing to its lightweight yet robust construction. The sight is secured to the receiver using a set of cross screws, and the trigger is adjustable, featuring a two-stage fire mechanism.
Variants and Performance
The OM-50 Nemesis is available in three versions: MKI, MKII, and MKIII. The MKI is a single-shot version without a magazine, while the MKII features a magazine holding five rounds. The MKIII, the most common variant, is essentially an MKII with additional rail systems for mounting accessories. When equipped with high-precision ammunition, the OM-50 Nemesis boasts impressive accuracy, with a 0.5 MOA (Minute of Angle) at 300 meters and a 1 MOA at 1000 meters. Notably, a U.S. Marine Corps sniper achieved a remarkable 0.25 MOA at 1000 yards.
Production and Evolution
Production of the OM-50 Nemesis ceased on December 31, 2010, when AMSD transferred the manufacturing rights to Swiss Arms AG. Swiss Arms AG took over the production and made several improvements, renaming the rifle to SAN 511. The SAN 511 comes in two versions: SAN 511-1 and SAN 511-2. The SAN 511-2 is similar to the OM 50 MKIII, featuring additional rail systems for mounting accessories.
Technical Specifications
Here’s a table showcasing the technical specifications of the OM-50 Nemesis:
| Feature | Specification |
|---|---|
| Caliber | 50 BMG |
| Barrel Length | 381mm to 838mm (interchangeable) |
| Weight | 10.5 kg (without magazine) |
| Magazine Capacity | 5 rounds (MKII) / Single-shot (MKI) |
| Effective Range | 1000 meters |
| Accuracy | 0.5 MOA at 300 meters, 1 MOA at 1000 meters |
Conclusion
The OM-50 Nemesis is a prime example of a firearm that combines cutting-edge design, modularity, and versatility. Its impressive accuracy and adaptability make it a valuable asset for military and law enforcement personnel engaged in anti-material rifle engagements. Although production of the OM-50 Nemesis has ceased, its legacy continues through the SAN 511, ensuring that its innovative design and engineering principles live on.