The Pentagon FX from Studies and Observations Group 17-61-01-57 is a revolutionary, full-sized knife, devised specifically for the contemporary warfighter. Conceived to represent a new stage in the development of heavy-duty fixed blade knives, it exhibits an impressive array of features.Central to its design is a double-edged CYRO S35VN full-tang steel blade that ensures durability and outstanding performance. The knife also boasts removable G10 handles, demonstrating versatility in practical usage. Accompanied by a GRN sheath, it perfectly aligns with SOG\'s innovative Universal Mounting System. The Pentagon FX is fully customizable to cater to diverse missions, engineered with the prime focus to surpass user anticipations. The package includes the mentioned sheath as a part of it.