- "Two stacked barrels that fire simultaneously. This offers twice as much down-range damage, but it impacts accuracy."
- — In-game description
The JAK Ettin Double Barrel Kit is a conversion kit for the AMR9 submachine gun featured in Call of Duty: Modern Warfare III as part of the Aftermarket Parts system. It was added as part of the Season One update.
The Ettin Double Barrel Kit allows for the AMR to fire two bullets in rapid succession with a small delay, similar to the AN-94's hyperburst. This comes at reduced damage, recoil control, and hipfire/Tac-Stance accuracy.