[quote=@13org]Yeah, my original idea was for it to be a bullet, so she could fire it from her rifle, but I thought that it would be too OP, wouldn't it?[/quote]
One way to balance it out would be to make it so Anya had to switch between channels to view things through a ThirdEye, rather than giving her a single unified vision. That way not only would deploying too many of them simultaneously be a little overwhelming to keep track of, but while using one Anya would be functionally defenseless and reliant on someone literally watching her back until she switched back to her main augmentation.

[quote=@13org]Well... even though Anya's rifle is silenced, people nearby can still hear as the bullet hits the ground/wall/etc.[/quote]
'Silenced' firearms are still surpringly load, and generally the term 'suppressed' is used instead. Most people would easily hear a silenced pistol firing either in the street outside their house or from a couple of rooms away inside the building. However, the sound tends to be significantly different from what most people associate with a gunshot, and such sounds tend to be disregarded as background noise and not reported or recorded.

Also it's a little easier to tag someone without them knowing when all you have to do is pull a pin and slip the ThirdEye into their pocket surreptitiously, rather than shooting them in the back. 

[quote=@13org]Now the big question is: Would it be fair for the bullet type and the device to have exactly the same range and drawbacks?[/quote]
I'd suggest that the bullet type would be a little smaller than the standard version you've described so far, since it would have to be able to fit into the 4x30mm rounds standardly used by her rifle. This would mean less refined sensors and reduced battery size. Overall that would make for a shorter life, smaller range unit which could be quickly and messily deployed at greater range, and would be inferior to the larger version which would require more planning and logistics to place.

Basically, if Anya has the time to get one of the other devices into place manually then it would be better to do that, but in a situation where she needs to quickly establish a sensor net in a hurry, the bullet type would allow her to get on point far faster.

Would the transmission range affect her augmentation in any way? Could Anya use the bullet types as a 'signal repeater' if she needed to relocate in a hurry and would be moving out of range of devices already in place?

[quote=@13org]PS: love ghost in the shell <3[/quote]
[url=https://youtu.be/XESreJjGx-I]Smelling lithium now...[/url] ;)