I have been wondering. For SF use, how about a bullpup version of the Honeybadger?

Why bullpup?

.300BO is optimised for short barrel performance - 5.5 inches is regarded as the sweet spot for subsonics & 8 inches (AFAIK) is optimal for supers.

HoneyBadger, aside from memorable marketing, is a well packaged 5.5" 300BO. EDIT: Actually 8” bbl. How do you see the tradeoffs of a bullpup justified by the longer bbl?

For reference, the minimum possible AUG bbl is ~14", since the gas block and piston are part of the barrel assembly and fit to the front of the housing (which is what Steyr calls the receiver). Contrary to assertions made to me by ex-soldiers, AUG barrels must protrude from the stock. (I kept quiet, rather than point out that I worked in the ADI (now Thales) Lithgow Small Arms Factory whilst at university and knew that it was mechanically impossible.)

5.5" is very short :) I was not aware of that. My idea was not a longer barrel, but a very short gun for SF. Doesn't have to be AUG. Also I was and am envisioning an integrated silencer that is big enough to actually silence the gun, which, from the pictures I have seen is a fair bit longer than the bbl. This would make the gun something like P90 in length - fully suppressed.

graylion said:

5.5" is very short :) I was not aware of that. My idea was not a longer barrel, but a very short gun for SF. Doesn't have to be AUG. Also I was and am envisioning an integrated silencer that is big enough to actually silence the gun, which, from the pictures I have seen is a fair bit longer than the bbl. This would make the gun something like P90 in length - fully suppressed

It's certainly doable.

The ar15 bullpup conversion, paired with a SIG MCX 5.5-8"+ suppressor, would be pretty simple albeit expensive to have done up.

Take something like this, handguard that goes over the suppressor, bing bang.

Here's a CZ Scoprion 9mm bullpup with 7.7" barrel. Terrible here, but with a suppressor and some sort of VFG or handguard could be ok.

Both of those things are awful.

And to what benefit? For control of the weapon, the centre of mass should be between your hands.

Reposting, years after the first time, because it’s still very persuasive:

https://anarchangel.blogspot.com/2005/03/why-bullpups-are-persistently-bad-idea.html

just spoke with a serving soldier in the Irish Army, who said this when I asked him about the AUG:

"Excellent ergonomics, Great for handling ranged and close quarters and is quite reliable in my experience.. Most of the flak Bullpups get are from Americans civilians who don’t use them."

graylion said:

"Most of the flak Bullpups get are from Americans civilians who don’t use them."

LOL.  Most of the world's armies do not want to use bullpups. 

And special forces typically prefer a conventional configuration.

Australia, for instance, recently adopted a SIG SBR in .300 BLK for SF units:

That's despite the fact that the F90 PDW could easily be chambered for .300 BLK and fitted with a suppressor.

Land Forces 22 - More Weapons from Thales - Soldier Systems Daily

Note that .300BLK when chosen by the military is to meant to replace the 9x19 , so MP5 , not 5.56x45 weapon. 

Australian SF also used 5.56x45 carbines in preference to the general issue 5.56x45 bullpups.

YouTube

AUSTRALIAN SOTG SPECIAL FORCES - 2 COMMANDO REGIMENT - HELMET CAM COMBAT FOOTAGE - AFGHANISTAN

Commandos from the Holsworthy based, 2CDOLeaked helmet cam footage.

YouTube

Australian Special Forces in Afghanistan (archive footage)

Australian special forces (SASR/2nd commando regiment) helmet cam footage from AfghanistanArchive footage "From the Shadows: Australia's Special Forces" docu...

stancrist said:

Australian SF also used 5.56x45 carbines in preference to the general issue 5.56x45 bullpups.

And French SF are also using 5.56x45 mm carbines instead of the FAMAS, but in the case of the French SF, (and I think it's also the case of the Aussies SF), one of the main goal is not to carry a big "we are French" or "we are Australian" tag.