A bolt-action anti-materiel rifle chambered in 12.7mm with a uniquely long 1,200mm barrel designed for extreme-range precision — the Gravedigger sacrifices rate of fire and portability for accuracy that borders on surgical at distances exceeding 2,500 meters. The weapon uses a free-floating barrel with harmonic dampening, a precision-machined bolt with zero vertical play, and match-grade ammunition hand-loaded to individual weapon specifications. Each Gravedigger is test-fired at the factory and ships with a ballistic profile unique to that specific weapon.

Carrion designed the AMR-3 as a precision anti-materiel tool for engagements where the first shot must hit because there will be no second shot. At 2,500 meters, the round's flight time exceeds 3 seconds — long enough for any aware target to move, any vehicle to reposition, any alert to be sounded. The Gravedigger operator gets one chance, and the weapon is built to ensure that chance is not wasted.

The Gravedigger's extreme range creates a unique tactical problem for defenders: at 2,500 meters, the shooter is beyond the effective range of almost every weapon system that isn't itself an anti-materiel rifle. Locating the firing position requires specialized counter-sniper assets, and by the time those assets deploy, the Gravedigger operator has disassembled the weapon and vanished. The weapon breaks down into three sections that fit in a standard duffel bag, and an experienced operator can transition from firing to packed in under 90 seconds.