So, I got bored, and made a fairly simple time dependent laser guided missile. I used a clock for the frequency so that it'll be way harder to intercept it.
It's a subassembly, and pretty much self explanatory (with the parts). Just stick it in, or modify it a bit, with the right nodes.
[PS]
This is a free build, it doesn't need require credit or whatsoever, but I hope this helps/or will be useful for those who wanted an ATGM but can't make one right.