It already has those features. The additional warheads were there because this missile is stripped from my fighters and was designed to punch through armor.

I would recommend reduce the amount of warheads on the missiles. Doing so would only reduce the damage output, which is already adequate with 2 warheads, without affecting blast radius. This also would provide room for additional systems, I.E timers for thrust override and sequenced activation. Regardless of how you decide to build it, I look forward to seeing new PMW systems on the workshop.

This one's manual and is a basic system, the missiles are just repurposed from my fighters with minimal differences. I might go back and add a proper "launch" where it flies more fiercely off the rail, but as of now it just inches forward for a few seconds before going off on its own.

This vehicle's been basically finished for ~2 months, I just had a lot of stuff I was focusing on and never got around to finalizing it and posting it.

I plan on making a proper SAM system with dedicated missiles, though :)

Funny, lot's of SAM systems have been posted as of late. I've been building some of my own too, does this have automated firing or is it a manual launch I'm kind of interested in how other people like to build theirs.