This is the largest weapon manufactured by PGM, chambered for the .50 BMG (12.7×99mm NATO) cartridge.

The barrel of the Hécate is manufactured by FN Herstal and is lined with Stellite alloy which is also used for large calibre machine guns.

[2] It is fitted with a high-efficiency muzzle brake which reduces the felt recoil to about the level expected of a 7.62×51mm NATO-chambered rifle.

[3] The rifle is equipped with both an adjustable front bipod and a rear monopod for maximum accuracy.

The Hecate II was a heavy firearm and weighs up to 16.00 kg (35.27 lb) at most.