Continuing the discussion from Post-Contact Hilarity:
I did love the review post, but just a few notes here for anyone looking for canon. Or cannon.
Technically, it’s got four. Powercell, ammoblock, thermal clip, and since it’s a sluggun, magazine.
(The former two fit into the fixed stock; the thermal clip screws into the side - bayonet fitting -, and the 64-round sluggun magazine snaps in on top like a P90’s.)
You are extremely unlikely to need to change out the ammoblock in the field. It’s good for tens of thousands of rounds. You usually change out severely depleted ammoblocks during regular maintenance.
You also usually don’t need to change out the thermal clip except during maintenance - the weapon’s designed to radiate away heat but the goo eventually crystallizes after many cycles - and the heat sink is usually a bench-replacement part on non-military models, but the military ones put it in thermal clips so you can swap it out in the field if you are engaging in sustained unusually high rates of fire.
(The exceptions here are hailguns, which are defined by sustained high rates of fire, and thus tend to combine disposable coolant and powercell into a single swap-out unit.)
The powercell’s the only thing you need to expect to change out regularly. Good for a couple of hours on an average battlefield. Press-and-yank the old one, shove a new one into place. Designed for quick-swap.
Side note: the magazine design uses a mechanism that rotates rounds on an elongated circular track, and drops them down to load. This allows you to load multiple types of round in a single magazine, then switch between them on the fly - essential for effective sluggun use on the modern battlefield.
While it does have a kick (especially when firing anti-materiel spikes rather than lobbing grenades), it’s surprisingly light by equivalent standards. They put a lot of effort into gyros, magnetorheological fluids, regenerative deceleration, and the like kinds of recoil damping.
It’s not one of those guns that will shatter your arm if you fire it without armor and bone weaves, at least.
Oh, boy. You do not want to short one of those powercells. They hold a lot of energy to run the mass driver for that long, and they’re the quick-discharge type for obvious reasons. If you did manage it, you would not be feeling any pain.
(Indeed, there is a special ops manual on the gentle art of using QD powercells as impromptu grenades.)
Fortunately for those needing to fight in rain, swamp, or ocean, powercells are inductively coupled to their receptacles, specifically to avoid problems associated with getting moisture and dirt in the works.
It took a bit longer to figure out an analogous heat-exchange system for the thermal clips, but it’s the same principle.
It’s designed to work with a personal (and optionally team) battle mesh, yeah. While the optical sight is nice and includes basic capacity-available indicators, the manual controls are, charitably, spartan. You get the selector switch (safe/rifle/slug) and three-detent trigger (single-shot/three-round burst/automatic-while-held), and can manually rotate the magazine to choose sluggun rounds, but that’s about it. No feature options for you.
That said, manual operation is intended as an emergency backup, not for routine use. Normally you could run it from a ‘lace or VII, a wearable, have your muse do it, run it from your armor hub or sub-warming, etc., etc. if all else fails, whip out your tablet terminal and program it that way.