What is the difference between having the M320 Grenade Launcher attached to your rifle and having it as a standalone weapon?

Is it worth giving up an attachment (like the forward grip) to have it under-slung?

  • From what I'm reading (Correct me if I'm wrong; I haven't played enough beta to unlock it) you can have it as a gadget and use an attachment like a grip or as an attachment and use a gadget like a medkit. In that case, it depends on which is more valuable; the gadget or the attachment. Probably depends a lot on your style of play. – SSumner Oct 6 '11 at 20:17
  • @SSumner No, how it works is: it's always a gadget that replaces your med-pack (gadget 1), and it's a standalone weapon. Unless that is, you use the "underslung rail" primary attachment, in which case it will become an underslung weapon, however only some rifles have the underslung rail attachment. – Mr Smooth Oct 6 '11 at 21:28
  • So even if you use it as an attachment, it still replaces your med-pack? If so, yeah, I can see no advantage to using it as an attachment. – SSumner Oct 11 '11 at 15:57
  • possible duplicate of How can I use underslung attachments in Battlefield 3? – DrFish Nov 2 '11 at 23:20
  • @Bora It's not a duplicate in any way, I know exactly how to use my underslung attachment, I'm just asking whether or not it's worth it, as the stats seemed the same (and they are). – Mr Smooth Nov 9 '11 at 5:21

Not underslung:

  • 1 second switch time
  • 3 second reload time


  • 1 second switch time
  • 3 second reload time
  • You have to give up bipod or foregrip

Everyone has to decide for themselves. But personally I think using it underslung is a joke.

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  • I'll probably wait until actual release to see if this still holds up before I accept it, but I'm actually very disappointed in this, from my own testing I figured having it as a weapon was way better, but I was hoping someone would find some advantage of having it underslung, or at least some disadvantage of having it stand alone. – Mr Smooth Oct 9 '11 at 18:54
  • per youtube.com/watch?v=UAfQNX14rCY underslung is supposed to be faster to deploy. We'll have to wait to see in the final this Oct 25th. – Jeff Atwood Oct 19 '11 at 6:47
  • Ok, I just did some testing using recorded video and playing them back side by side, and they're exactly the same even in release, so I'll be accepting this answer, but editing it a bit. – Mr Smooth Nov 9 '11 at 5:19
  • @MrSmooth, could you link to your video? I agree it does seem broken as is. Maybe we could get the video in front of a community manager or developer. – robertpateii Dec 9 '11 at 17:53
  • @robertpateii I never actually rendered the video, and I no longer have the footage, I just put the videos side by side in the the video editor without actually making a video. – Mr Smooth Dec 9 '11 at 22:45

The M320 is a stand-alone grenade launcher in the "gadget 1" slot. Medics, for instance, must give up their med-kit in order to use an M320. I've seen a lot of questions about this related to the underslung rail. The underslung rail is supposed to reduce the time it takes you to switch to the M320. Even though the underslung rail supposedly mounts the grenade launch under the barrel of an assault rifle, it still takes up your gadget slot- so you must still give up the med-kit to use the M320.

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There is a video on youtube by user Darius822 that measures the switching times to and from the M320 grenade launcher and the M416 assault rifle:

According to the video's description, he used macros to trigger the weapon change to make sure the timings weren't affected by human errors.



Switching to: 18 frames = 0.6sec
Switching from: 16 frames = 0.53sec


Switching to: 17 frames = 0.57sec
Switching from: 24 frames = 0.8sec


So it seems there is a small performance gain by having it mounted underslung when switching from it back to the assault rifle (50% faster). That could mean surviving a sudden encounter with an enemy...

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