stalker
The subject of this article appears in S.T.A.L.K.E.R.: Shadow of Chernobyl.

Variation of the Chaser. A small fragment of the artifact "Gravi" was built into the barrell[sic], positioned in such a way as to increase the speed of the bullet's flight.

In-game description

The Combat Chaser is a unique weapon featured only in S.T.A.L.K.E.R.: Shadow of Chernobyl.

Description

The Combat Chaser is a modified Chaser 13 shotgun which was modified to include a fragment of the artifact Gravi to improve bullet velocity. As a result, the weapon has increased damage per shot and reliability, although its ammunition capacity is reduced by 1 round.

While the Combat Chaser is the most powerful shotgun of the game, its magazine size is very limited, especially compared to a SPSA14 which can hold up to 8 rounds at once.

Acquisition

This weapon is held by Father Diodor, who can be found at the Crooked beam in the Army Warehouses. Diodor is the target of one of Sidorovich's assassination missions, allowing the player to take Diodor's weapon when completing the mission.

Another Combat Chaser can be found in a stash in the Wild Territory - Secret stash of the Lucky One, alongside a very rare Mama's Beads artifact. The stash coordinates can exclusively be acquired from a dead Expert Loner in the Wild Territory. Scarecrow is likely the only stalker who will meet this requirement as he's specially scripted to be the the sole Expert Loner who can join a camp in the Wild Territory, which occurs after the Meet Kruglov mission if Scarecrow is still alive and hasn't already joined another camp.

Trivia