Sounds like a good idea, but might cause some issues when attempting to fire out of a cover.

Also it would be nice for the character to automatically resume the aiming stance he had before the collision once there is enough space to do so, to make it more smooth when attempting to fire over obstacles.

Would be nice if it were implemented as some sort of smart system that automatically lowers/rises the weapon depending on which direction the barrel or frame of the gun approaches the colliding object. This might prove too hard to implement though.

I think one nice solution could be to implement a press-and-hold mechanic to lower the weapon so that when you press down a button the weapon lowers and it allows you to move closer to objects, walls etc. Once you release the button the weapon should be raised but only if there's nothing obstructing it: if you've had your weapon lowered and moved closer to e.g. a wall then your weapon shouldn't be raised when you release the button.

Jukk: there is already a key to raise/lower. Not a solution.

Also important for moving through doorways.
I'd rather have the weapon move down and back up rather than get stuck as currently.

When in optics mode it should NOT auto-lower

"When in optics mode it should NOT auto-lower"
+1 - That is the solution.

Auto lower would be great for CQB. Therefor i upvoted this also :)

Auto lowering is kinda a pain in the ass.This could maybe make shorter weapons have better CQB qualities if they don't get this auto lower weapon effect.

shouldnt there be collision arcs around the entire unit with weapon that wont let you in that close, or push you back if you do raise weapon in such a manner? Forcing weapon down is wrong logic in my mind..

Well better be ready that be with lowered weapon.
Character doesn't stuck much in buildings.

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It's funny you mentioned Ground Branch. My dream is to see everything in Ground Branch implemented in Arma. That would be a game I would play for the rest of my life.

Upvoted! Crysis did this, and a mod made it possible for ARMA 2.

If it is going to be implemented, please make it as an option, that can be switched ON or OFF.

Short barreled weapons must have an advantage over long-barreled weapons, otherwise their presence is kind of pointless.

Like armapirx said, if implemented, an option to turn this behaviour off would be nice.
There are games out there where you can try out if you would like such a feature. Or pick a broom and walk through your apartment.

I prefer to point the weapon in the direction of a potential threat and use my legs to maneuver around obstacles over auto pull down and not beeing ready to shoot because of potential ugly hitboxes that force this behaviour to be triggered.
Only because moving your body a little bit(remember leaning) is faster than pulling the weapon down and up again.

If done right, this will give shorter weapons some advantage which is nonexistent now. Nice idea.

I agree with this, but this could very quickly become a HUGE annoyance in CQB. Unless CQB is more fluid, this would never work, because in reality, you would maneuver your gun around corners and etc, but in Arma 3, CQB is too clunky, and therefor you'd be lowering your weapon constantly, making you vulnerable indoors.

CQB in Arma 3 isn't that bad. It's just different from your average FPP shooter and requires different maneuvering techniques. Try it out IRL, indoors with a long object of your choice (rifle, airsoft, broomstick, guitar, whatever), then ingame take weapon's length into account and you'll see the improvement.

Here's proof:
http://www.youtube.com/watch?v=hcRDtexQa9k

I very much agree with this. It was in an Unreal mod from years ago I recall (and probably a few games since) and it's always disappointing to see modern games without this, as it makes CQB much more realistic and tactical.

In addition to this, 'Low ready' would be great for CQB.

http://feedback.arma3.com/view.php?id=6181
http://feedback.arma3.com/view.php?id=6724

Doing Challenge speedruns has made me realize ARMA controls are actually very realistic. You're really swinging your weapon around and have to do very exaggerated movements to make sure you avoid slapping your weapon into walls. However this is not ideal because in reality you could lower your weapon briefly to make a quick turn against a wall and in ARMA you can't. Upvote.

My only fear is that the animation
will be too slow. if this is done it should
be a very quick an persice movment.
So the CQB flow wont stop while
making entries and so.
On the other hand, if done right, it
would make CQB much more fluid.

Just make sure you make it a very very quick down/up animation.

No. Getting your weapon lowered accidentally in the middle of a CQB fight would be extremely annoying.

Instead, fix 0009181:

http://feedback.arma3.com/view.php?id=9181

Players can lower their own weapon then when they actually want to.

They can make the "lower weapon" animation less clumsy, though, so people actively lowering their weapon won't take so long (IRL it's pretty quick and natural).

Well if the weapon doesn't lower automatically, it would prevent the player from moving nearer to the wall (unless it's a magical bendy weapon), so it's a matter of deciding which would be more annoying, having the weapon automatically move out of the way when you're trying to move closer to the wall, or having it not lower and be prevented from moving to where you want to go until you first manually lower the weapon.

I think the weapon moving away will be more annoying. But to know for sure they first need to fix 0009181, as until the fix it, the weapon lowering is purely visual and thus obviously annoying in all situations.

Some fix is needed - if a weapon is shorter, it should have the advantage indoors, no?

Don't automatically lower weapons. Stop the play from moving forward and if he lowers his weapon, he can move farther forward.

I think they should enabled the weapon collision, just as was before. Currently there is no benefit to use short weapons in CQB.

Add auto-lower, when the player move to close to the barrier or strafe through the door.

When in optics mode it should NOT auto-lower.

Add an option into Controls->Game. Elite players maybe want to lower/raise it manually(sometimes it is good when the weapon is stand against the wall and don't let me move in cover.

If this gets implemented, the animations should be seemless and not like the weapon switching while running.
Also, it shouldn't require you to press a button when you back away from the object again.

So if you get close to a object that blocks your weapon > Lower weapon (except when you ADS (aim down sight)).
Back away from the object, automatically raise weapon again.