All of the models below are part of Matchbox's Real Working Rigs line.
Abrams M1A1 Tank
The level of detail on these models is outstanding. A more realistic paint job and they fit right in on the tabletop. The scale may not be an exact match for 15mm, but it is close enough to work.
I've picked up a total of four of these models over the past few months. Two are the gray/blue/black scheme seen in the pictures. The scheme actually looks pretty good, but I could do without the “United Alliance” markings. The other two were part of Mission Force packs and had a hideous black and green paint scheme. Even worse, the paint was thick enough to obscure the details of the models. I've already stripped one and the other is going through a long soak in Simple Green. I'm thinking about a jungle green scheme might work well over the green plastic pieces.
Stryker M1128 MGS
These are based on the real world Mobile Gun System version of the U.S. Army's Striker. The gun in question is a 105mm cannon. My understanding is that the vehicle was designed for situations calling for a large bore direct fire weapon, but not the tank that usually comes with it.
The detailing is excellent, but the models are a little too large to be in scale with 15mm. That's fine with me, since I have no plans to use them in a modern game. These will likely end up being repainted for sci-fi wargames like Tomorrow's War. They have the right look to be convincing as tank destroyers or in an infantry support role. Unfortunately, placement of the cannon and the fact that the rear hatch opens to a blank panel makes using one of these models as a troop carrier problematic.
Tracked Missile Launcher
As far as I know, this model is not based on a real world vehicle. Most of the large missile launchers that I am familiar with are wheeled rather than tracked.
The model is nicely detailed, although there are some mold lines on the plastic missiles. This model will likely see use as an objective in sci-fi wargames. A planetary defense force would be wise to keep some of its missile launchers mobile and in the field to survive a surprise attack The missiles are big enough to convincingly threaten a large target – like part of a planetary invasion force or the ships that deployed it.