Well, you have to be careful about engagement range. OIA probably doesn't care about collateral, but this is still densely built (if not populated) urban blocks. Olympus is also ambiguously capped or sealed, there could be environmental hazards to look out for with watching where you shoot. Especially if your backstop ends up toward rather than away from the elevator in the center. Even if it's not an actual risk you don't want to be the guy who loses a badge because he accidentally blew a chip out of probably Mars' single most important piece of economic infrastructure. I'd expect probably tiered or staggered responses based on what they know. If there's a police drone with a camera looking right at the PCs fixing a giant multiped tank in the middle of the street or whatever - they're not sending a truck. UAV's will flatten the block with a missile. If they just know some guys probably ran off with some serious hardware then probably a smaller fireteam or fire-and-maneuver team will push up first, engage only if attacked and attempt to recon, probably spot-and-mark and guide in a heavy assault from the serious weapons back at the truck. If there isn't a ceiling on Olympus you can probably use seekers like a mortar and get a vertical strike pretty easy. Again, collateral wouldn't be a concern. If they just know people are causing trouble in the neighborhood (I/E a giant tank fight happened) then probably more cautious, more measured? They'd sweep and clear the area and while serious firepower would be around it might not be on them. They'd be prepared to engage infantry in close quarters - and then they can get a round of seekers if say, they bump into a tank in a garage. But this informational picture takes a backseat to what the GM is trying to do. If this is just a verisimilitude thing - trying to present the realistic response for a situation then you have to drop the hammer. PCs don't win against a SWAT team if they're doing things that call SWAT teams. Not even if you're 6 Exhumans running a Fenrir in some shitty slum in Remembrance or the Jovian Republic. But in that case you almost shouldn't be rolling dice because the bullets will just catch up to them eventually. If this is more meant to be a kind of obstacle either as a complication to their actions or the next step in the scenario then reasonable expectations can be stretched. You can catch the projected single team of guys off guard and disable them long enough to get away or finish some project or whatever. Given how brutal combat is most of the time and the PCs will likely be out numbers, just automatic weapons and the possibility to engage with seekers of certain flavors, wrapped in the full heavy combat armor with probably some safety mods will give most groups pause. The Trained Military profile in NPC File is just a Railgun AR and armor 20/18 (Heavy, Helmet and Ablative) - and you might count the pistol from the original Security Trooper profile.

I suppose it really depends on what you consider MilSpec - to me, that really means "don't get fancy". As they're supposed be be focused on Warbots and Swarms, I'd say lots of plasma and AoE weapons but little in the way of rapid fire stuff - so no Railguns or Kinetics. I'd say 2 groups of three (Close Quarters, Standard, Support) one of four(Close Quarters, Standard, NanoTech, InfoTech). - Close Quarters - Battlesuit with a riot shield and mounted Plasma Cutter. - Standard - Battlesuit with Seeker rifles loaded with accushot plamaburst micromissiles*. - Support - Battlesuit with Combined Freezers/Torches, and Seeker Pistols firing EMP Micromissiles and/or Homing Splash filled with guardian nanoswarms. Also carrying tools for stackpopping and Nanobandages. - NanoTech - As support, plus: Synth (to taste) with Built-In General Hive loaded with Guardians, Saboteurs, Disassemblers, Fixers, Injectors, and whatever else you want. - InfoTech - As support, plus: Synth with Brainbox, possibly built into the Truck. Standard Infosec gear, seeker rifle loaded with EMP minimissiles. All armor has the Immunogenic System, Fireproofing, Refractive Glazing and the Faraday Armor Mods, and uses encrypted Laser coms. --- Battlesuits with Fireproofing and Refractive Glazing have an effective armour vs Plasma of 36, which is the (theoretical) maximum a Plasmaburst Micromissile can inflict without bonuses from good rolls, making them functionally immune to friendly-fire/close-range detonations (no attack roll = no bonus damage or armour bypass). If having the whole team using vanilla battlesuits seems too much, then use Crasher-, High-dive- or HardSuits for the non-Close-Combat members instead. *Accushot-Plasma-Micromissiles - moderate max damage with means less risk of instakill for the PCs and less risk to the team should a member become compromised, Accushot makes them equally viable at all ranges, Plasmaburst are equally good against armor and swarms, and because they're seekers they're very forgiving if you miss. All together, they're simply a solid choice against most targets under most circumstances. The main downside is the ammo cost, which doesn't apply to NPCs - if you need a justification, they have their own dedicated Maker.