Just letting you know, its effects only work with ground targets.

If you want missile to stop smoking, then go to Overload and give it a MaxSpeed of "INF". Yes, you can type those letters in there.

@QuesoAirlines Yeah, setting these up and especially putting multiple of them in weapons bays is hell.
Recently did this on my naval challenge entry and even though I got them to work right with separated names, it was extremely finicky and annoying
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But the ultimate reason I'm doing this in the first place is was first to build a stealth missile, but also as an easy ft-less way to make smokeless and no lock missiles

I can post a more in depth explanation on how to set this up on an aircraft by this Monday, cause its REALLY annoying to work with sometimes.

There's a few options for missiles that will not show a target a "WARNING" text, but as far as I know, all of these solutions still show a target the "LOCKED" text.

maxres's A-38 Skua

This aircraft has two GBU-16 Paveway II bombs that can lock on to a target instantly without emitting a smoke trail. The bombs can be launched without line of sight with the target which can allow for a much safer attack profile. Targets are only notified once the bomb is released.

This bomb works by having a cannon part and missile part having the same name. The cannon has priority to be fired, so it will not attempt to lock until the FireWeapons button is pressed.

Video Link

I've edited these missiles in the video to be able to target both air and ground by setting the missile and cannon's function to MultiRole.

The bombs are extremely temperamental to reverse engineer and may require some funky trees knowledge to set up.

This is also the same tech that I used on my NI-18 Dove. The missiles that I created for the Dove was inspired by the nuclear weapons featured on Thecatbaron's SNB-28A-Cutlass

The problem with these is that they still emit smoke.