So, when I say small dragons, they're still around the size of a Clydesdale horse, of course. While this might seem small, that's because you're watching them on a small screen and because people forgot what shot composition is. Believe me, they're big enough to wreck stuff.
Anyway, it's rare for them to be in a more modern setting, but I was like "Why not?" So, now there are dragon marines.
A dragon can fill a unique niche in a squad. They're usually either a gunner, which means we strapped an automated SAW (Squad Assault Weapon) on their back; or an anti-vehicle rocketeer (thus, I welcome the Long War fans) when we strap some missiles on their sides. Originally, my choice was the FGM-148 Javelin. When I first saw Javelins I was pretty happy with what it could do, but dragons have unique problems and advantages, compared to a regular operative.
Dragons can reach altitudes of 4.6 kilometers high and can glide through the sky at 35 m/s. I limited their carrying capacity to 80 kilograms for equipment, though I'm unsure of the real limit. They can carry less but are able to fly, the headwind helps the infrared sensors cool down faster, and the missile can be dropped, so no need for a soft-launch system. I'm actually sure dragons would be slightly better at handling backblast.
They're also more vulnerable to AA, so MPADS and 40 mm guns, though those are rarer. There are countermeasures for MPADS in real life.
So, why not make a missile that takes full advantage of the dragons' capabilities?
Rocketeer dragons tend to go for fortified positions, APCs, and rarely, tanks. Dragons prefer not to slow down and keep a safe distance
(at least two meters) while doing so. If they spot an AA cannon, they dive behind the nearest obstacle and try to get out of the thing's firing range on foot.
The targets are fairly advanced, though still slightly below the Foundation's technological level (the faction the dragons are the members of). This means an FGM-148 Javelin can one-shot them.
Just what kind of missile would suit rocketeer dragons the most? Keeping them alive is the priority, but combat effectiveness is also important, meaning weight should be as low as possible, especially if we want to leave space for MPADS countermeasures.