[SavarWallk]

pg. 461 Standard weapon mounts may hold any assault rifle or smaller-sized weapon and 250 rounds of ammo.

pg. 428 and also because of its under barrel grenade launcher

now it shows a 42(c) and the grenade launcher as a 8(c)

so how much ammo/grenades can I have on my Nissan Doberman ?

 250 rounds of ammo and the clip of grenades ?

[WellsIDidIt]

It never states it has to be the same kind of ammo for all 250 rounds of ammo. By the book, I'd say you can mix and match what you have stored and feeding into the weapon.

[SavarWallk]

would I need two different autosofts one for the rifle and one for the grenade launcher ? I would assume so

[Namikaze]

Treat the Autosofts as a skill for the weapon.  I think by default, the grenade launcher uses Heavy Weapons, while the Alpha uses Automatics.  This might not be correct though - I've changed my skills for my table.

[RHat]

I'd rule it (and I'd emphasize that this is "ruling" territory) that the underbarrel launcher counts as part of the weapon.  Thus, as the Autosoft is taken for the weapon (and not even for the class of weapon, but quite specifically for the Ares Alpha) and not for the weapon skill, it covers both functions.

[Namikaze]

RHat's ruling is perfectly reasonable.  I think you should talk it over with your GM, find out if he treats them as separate or not.  Then buy the Autosofts accordingly.

[Csjarrat]

autosofts cover a specific weapon so will cover any accessories/features that weapon is supplied with as standard, such as underbarrel grenade launchers.

as for the question on ammo and mounts, honestly, the rules are non-existent for how it works.
the 250 round thing was always for belt-feed guns like LMG's in previous editions and it seems very "off" to me that a weapon mount auto-magically makes any gun from a revolver to a shotgun into a belt fed machine of death.
it is likely to stay very vague until the rigger splat book comes out, so i'd advise clearing up this issue with your GM before it becomes an issue.
i know in my games the 250 round capacity will be for belt-fed weapons only, so would maybe plan to use high capacity weapons like the shiawase arms monsoon from GH3 (stores 120 rounds before needs to reload) or take an LMG

[RHat]

I can sorta see the way it works for revolvers; the cylinder is swapped out for something that uses the same rotation to carry a round into the chamber, seal it, and rotate that one out to bring the next one in (or maybe it only works with caseless rounds).  Shotguns would be pretty similar, with the other side of the belt ejecting (and probably coming to pieces as it flies out) along with the shell.

[Csjarrat]

I can sorta see the way it works for revolvers; the cylinder is swapped out for something that uses the same rotation to carry a round into the chamber, seal it, and rotate that one out to bring the next one in (or maybe it only works with caseless rounds).  Shotguns would be pretty similar, with the other side of the belt ejecting (and probably coming to pieces as it flies out) along with the shell.

yeah, i mean its feasible, its just funky. and there are no explicit rules for it like in other editions.
its a GM's call either way, so to the OP: check with your GM.

[firebug]

I can sorta see the way it works for revolvers; the cylinder is swapped out for something that uses the same rotation to carry a round into the chamber, seal it, and rotate that one out to bring the next one in (or maybe it only works with caseless rounds).  Shotguns would be pretty similar, with the other side of the belt ejecting (and probably coming to pieces as it flies out) along with the shell.

It definitely makes sense that the weapons would be modified as they're put into the mount.  One can assume it's not intended for you to be able to just pop the gun out of your vehicle or drone and start firing it normally.

The ammo also doesn't say it becomes the new magazine size.  I think it's that you can have it "holding" that much ammo to draw from when it reloads?  Though if that were the case, Rhat's example wouldn't be as relevant and it'd be a weird ruling to decide how many bullets the drone can reload into a cylinder in a single phase.  A strict RAW reading though says it's just holding the ammo, and doesn't change the magazine at all.

Though that makes me wonder what action it is to reload a mounted weapon.  Especially if it's an internal mount, unless you've got like a hatch that opens for you to pop another clip in.

[WellsIDidIt]

The mount doesn't change the firing mode of the weapons, just the ammo capacity. If you slap a pump action shotgun into the drone, it already has to have a mechanism in place to pump the shotgun. All the mount does is increase the ammunition it can hold. That's not really hard. The only reason ammo is so limited normally is because of the space and weight limitations us puny humans have when holding a firearm.

[Csjarrat]

The mount doesn't change the firing mode of the weapons, just the ammo capacity. If you slap a pump action shotgun into the drone, it already has to have a mechanism in place to pump the shotgun. All the mount does is increase the ammunition it can hold. That's not really hard. The only reason ammo is so limited normally is because of the space and weight limitations us puny humans have when holding a firearm.

i'm not so sure mate, unless your drone has arms, then we're off into GM fiat territory. there's nothing in the rules that say a weapon mount will pump your shotgun for you, though likewise it doesn't say that it doesn't do it for you.
If we're talking that the drone is magically turned into a belt fed weapon of doom for revolvers and pump actions, then it would also apply to the vintage cap and ball muzzle loading rifle in GH3 too; which frankly, is a bizarre concept and require too many mechanical arms to contemplate.
i think the safest thing to do in these situations is to use common sense until the rigger splat books come out or the issue is cleared up in errata.
we can establish a trend based on previous editions and extrapolate from that,
after all, why were extended clip (100 drum) modifications so popular in 4th (as well as with the dual clip feed mod), if the system clearly wanted you to just put your revolver in a weapon mount and have it turn into a belt fed equivalent?

like i said before, check with the GM, its his game world, he'll tell you how they work in his game.
in my personal opinion, i would enforce the old ruling in the absence of any new ones; 250 rounds are held for belt fed weapons only.
hth

SR5 pg 462-463 for reference, emphasis mine.

Vehicles may be equipped with a
number of weapon mounts equal to their unaugmented
Body ÷ 3 (round down). Standard weapon mounts may
hold any assault rifle or smaller-sized weapon and 250
rounds of ammo. Heavy weapon mounts count as two
weapon mounts and can hold any weapon and up to 500 rounds of belted ammo or up to Body rockets/missiles.
All weapon mounts are operated remotely and can
target a ninety-degree arc of fire (horizontal and vertical).
Manual operation can be added, but only for vehicles,
not drones, and at extra cost.

[WellsIDidIt]

i'm not so sure mate, unless your drone has arms, then we're off into GM fiat territory.

Yeah, no. Not unless your drone also has to have arms to "pull the trigger."

When you put a weapon into a weapon mount, it's taken for granted that the weapon mount is designed to operate the weapon. It's not hard. These are things that you can do today fairly easily.

i think the safest thing to do in these situations is to use common sense

That works if the GM has any common sense when it comes to these things.

If we're talking that the drone is magically turned into a belt fed weapon of doom for revolvers and pump actions, then it would also apply to the vintage cap and ball muzzle loading rifle in GH3 too

It's not magic. Just for your information, there was a way to turn the Colt Revolving Rifle into a belt fed weapon on a turret. It was a design that tried to replace the gatling gun at one point. Unfortunately, barrels at the time could not handle the heat and leather belts were problematic with percussion caps (who'd have thought), so it failed in application, but the actual mechanics behind it were extremely simple and could easily be done with modern electronics. Especially in a mounted weapon.

As for the Vintage rifle, maybe you're forgetting this:

VINTAGE
The weapon is not compatible with modern electronics. This can be the result of outdated manufacturing, physical
age, or bad design. Physical upgrades are possible, but adding them requires additional work that costs twice the
normal listed amount.

I'm pretty sure a remote operated drone turret counts as modern electronics.

[Csjarrat]

i'm not so sure mate, unless your drone has arms, then we're off into GM fiat territory.

Yeah, no. Not unless your drone also has to have arms to "pull the trigger."

When you put a weapon into a weapon mount, it's taken for granted that the weapon mount is designed to operate the weapon. It's not hard. These are things that you can do today fairly easily.

i think the safest thing to do in these situations is to use common sense

That works if the GM has any common sense when it comes to these things.

If we're talking that the drone is magically turned into a belt fed weapon of doom for revolvers and pump actions, then it would also apply to the vintage cap and ball muzzle loading rifle in GH3 too

It's not magic. Just for your information, there was a way to turn the Colt Revolving Rifle into a belt fed weapon on a turret. It was a design that tried to replace the gatling gun at one point. Unfortunately, barrels at the time could not handle the heat and leather belts were problematic with percussion caps (who'd have thought), so it failed in application, but the actual mechanics behind it were extremely simple and could easily be done with modern electronics. Especially in a mounted weapon.

As for the Vintage rifle, maybe you're forgetting this:

VINTAGE
The weapon is not compatible with modern electronics. This can be the result of outdated manufacturing, physical
age, or bad design. Physical upgrades are possible, but adding them requires additional work that costs twice the
normal listed amount.

I'm pretty sure a remote operated drone turret counts as modern electronics.

I've always seen a weapon mount as just that, a bracket or bracing mechanism to strap a weapon into.
in the shadowrun world, this includes a power feed and linkage to the sensors and ammo bins.
they have a small range of fire made capable by some servos (5 deg i think in sr4 for fixed mounts and apparently 90 deg in sr5).
In lieu of a rule that says the mounting procedure for a weapon into a mount also converts this weapon into a belt-fed weapon, then i'm not playing it as such.
There are plenty of high capacity weapons and a couple of belt feeders that will work fine in my campaigns.
You're obviously entirely free to come to your own opinion and rules for your table, but as i said earlier, i find it a bit funky and don't like it.

[Namikaze]

For what it's worth, I don't think there's any value in getting into another debate about the semantics and physics of Shadowrun.

My two cents though: the drone should have control over the firing and loading mechanisms of the weapon, which would likely include an electronic capability to cause a shotgun (the example being used) to rack a new load.