The ABR 223 tactical rifle in Call of Duty Black Ops 4 is a burst fire rifle with medium damage. Without attachments it takes multiple bursts to kill unless you get a headshot. The ABR 223 is best used at medium range.
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ABR 223 Best Attachments
The best attachments for the ABR223 are those that help you at medium range. The reflex sight makes it easier to spot enemies and quickdraw helps you bring up the ABR 223 faster. Grip reduces the recoil of the ABR 223.
ABR 223 Best Gear
The best gear for the ABR 223 helps you stay alive. Use body armor for a slight health boost on respawn and your favorite secondary for close quarters.
ABR 223 Best Perks
The best perks for the ABR 223 help you maneuver the map. Flak jacket protects you from explosives and cold blooded and ghost help you stay off enemy UAV and equipment.
ABR 223 Best Class Setup
Here is the complete best class setup for the ABR 223 in Call of Duty Black Ops 4.

ABR 223 Tactical Rifle Best Class Setup Call of Duty Black Ops 4