[demion]

Many weapons come with an integraded gas-vent system 2. But the maximum rating for an gas-vent system would be 3. Now in the gas-vent explanation it's mentioned, that once applicated it can't be removed.

So, does this mean you can't upgrade weapons with a integrated gas-vent system 2 to rating 3? Is there really no way?

[Kincaid]

This is one of the weirder RAW parts of the game: gun mods.  I'll simply say it can be a little counterintuitive.  Mods that come with a gun are integral and don't actually use the slot (p. 417, SR5).  So this means a strict reading allows you to have whatever gas vent the gun comes with (integral, so no slot used) and an after-market gas vent 3 (using the barrel slot).  Suffice to say, not all tables play this way and you get one gas vent--if your gun comes with one, you're stuck with it.

[ScytheKnight]

The way I generally handle it is if you've a gun with Gas Venting 2, you can pay the difference to upgrade to level 3... however I also rule that the Ingram Smartgun X is an exception to this as it is the only weapon to feature both gas venting and a silencer, so to me this seems like a propitiatory technique unique to this weapon and it can't be further modified.

Also just be careful about guns that have recoil compensation, because not all of them get this via gas venting, sometimes it's internal design. An example of this is the Ares Alpha which gets it's recoil comp bonus from it's chamber design, this would stack fully with a gas venting system.

[Top Dog]

I'd say Kincaid's answer is most in line with RAW. It's also silly, so I'd never play it that way.

I'd rule it that you can replace the current system. You have to buy the R3 one - you can't really combine a R2 and R1 one to get a better one, after all - and put it in, replacing enough bits of the old gas vent that it's not functioning anymore (leaving just the R3).

But that's just me.

[Reaver]

Actually, thanks to RnG (page 53. The red box at the top, with the table)

You couldn't do as Topdog says, as it explictily says "you can't put the same item twice and expect double the benefit"

So, no two gas vents.

[Top Dog]

Is Gas Vent 2 the same item as Gas Vent 3? Also, you're only putting it in once.

Okay, now I'm being pedantic . That line is probably on point, and regardless I think many GMs will follow that anyway.

[Reaver]

Ahhh...

I see what you are saying....

The barrel mounted GV3 overrides the integral GV2. Giving you JUST the bonus of the GV3.



Yea, I would go with that at my table too. It is still costing you the barrel slot and the cost of the GV3, for just a GV3 bonus. Yep. No issue at all.

[SmilinIrish]

Someone correct me if I'm wrong, but gas venting is just porting the barrel of the gun (ie, milling holes).  Gas vent isn't an object that is installed.  This is how I've always viewed it.  We play that you can absolutely increase the venting of the barrel from 1 to 2 to 3, since they aren't objects but a process.  Also with the exception of the Ingram (?) which has both venting and silencer RAW, we don't allow both on guns.

[Duellist_D]

Not necessarily.
A compensator could be milled ventilation holes, but in theory you could also attach a device to the muzzle that vents the gas in an appropriate way, comparable to a muzzle break.

Regarding silencers and Compensators:
I'd allow putting both on the same gun, but not using them at the same time.
Constructing a compensator in a way that allows for an easy closing of its ventilation holes seems possible to me.

[NovaHot1]

That's a hard one, as it specifically says once a gas vent has been put in a firearm, it cannot be removed.  That to me seems like it couldn't be modded either. But that said, I would rule at my table that you could request a custom job from your weapon's dealer if you pay the extra nuyen.

[The Wyrm Ouroboros]

The barrel-mounted GV3 cannot 'override' the integral part-of-the-barrel-already GV2.  What is it going to do, stop up the vents?

If it's an integral system that's a modification to the structure of the weapon (as compared to the electronics, e.g. smartgun), you cannot 'upgrade' it by attaching another part to it; you may not even be able to upgrade the integral part.  Generally, I would think that the replacement barrels made for the weapon (by the manufacturer, natch) all possess the same integral system.  You could, however, pay an armorer for a custom modification - maybe he makes barrels sans integral GV2 for the weapon, and makes a fair amount of change from chummers like you.  In this case, I would price the mod as being equivalent to at least 10%, maybe up to 30%, of the weapon cost, and with a reminder that using the weapon in such a fashion voids the weapon's warrantee.    The mod, note, does not include the upgrade, e.g. the GV3, the addition of which would cost the full price of the mod.

[Krindi]

I think a better question to ask is, "why do multiple ranks of this exist?"  The mod is so inexpensive that nobody would ever purchase any version other than rank 3. Including ranks 1 and 2 seems pointless.

Seems like having a 2 recoil version that's reasonably priced, and a 3 recoil version that's very expensive would make an actual choice to consider.

That gas vent 1 though? I doubt anybody has ever used it.

[PiXeL01]

You could say that about 90% of all the weapons. Just look at assault rifles, why buy anything but an alpha straight out of character creation?
The reason would be fluff and not all beings either access or funds to buy sota. Gangers, hobbyists and clueless civilians will be the targets for the low grade and less efficient stuff.

[Jack_Spade]

Hangers, hobbyists and clueless civilians players will be the targets for the low grade and less efficient stuff.

Fixed that for you

[PiXeL01]

No no no. Players are always looking at big numbers, especially new or munchkins.
Back in 2 (maybe 3) the gas vents did come with a concealability penalty equal to their grade or something like that