Headshots indicators already indicate when someone shoots at a persons head. Of course, this is indicated by a red X on the cursor and a sound indicator, being a clicking sound. Of course, this is useful for knowing if you have done extra damage to a person. However, here I suggest another indicator for Kills instead of headshots.
Sure, there is currently a way to snipe at someone from far away and check if your kill count rises, but this is a hassle to do. Kill indicators can quickly fix the time it takes to confirm a kill by hearing a sound indicator and possibly even a visual one. It would help with long ranged combat on both sides, whenever your sniping AEGIS as a raider, terminating targets as STHD, or firing your 1S on the roof at someone and your not quite sure if the boxes on TLS blocked their hit or somehow passed through.'
Overall, this is a minor change that would add a QoL improvement. While I know that people dislike QoL improvements, it should be noted that this isn't a change to AEGIS only, its a next step of a change to answer the simple question of "did I kill this guy, or not?"