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So the Honey Badger concept has officially taken me. Following Sig's MCX/LVAW concept has me really digging the idea of meshing a subsonic giant pill slinging rifle in a very compact package. I've stayed away from .300 BLK for some time but this may make me take the plunge and get me into reloading at the same time.
Question: How short can we go on the barrel? Has anybody gone 6 to 6.5"?
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I'm no expert but I would hate to see your question go unanswered.
I know internet opinions are like assholes...mostly full of shit....but there are reports of successful 300 blackout SBR builds with 6-6.5" barrels a DI gas system. The honey badger for example was one of those, albeit it slightly bit of vaporware. My point here is that you should be able to find some data out there for building a DI 300BLK on that system. I know that most of the data I saw when thinking about going the 6" route was that it might be necessary to really devote some time to load development to get it to run reliably. I wasn't sure if I was even going to like the platform at the time so I went with an 8.5" barreled upper. You can easily find 7.5" barrels and typically I did not see the same criticisms of them being unreliable with a wide variety of loads.
FWIW I'm currently kicking around running a 7.5" with a 6" can. For me, if this will run reliably then that is more important to me than the 1" of barrel length. Also for full disclosure I'm waiting until my solvent trap tube shows up to make the final determination. I might be ok with just the shorter 6" dedicated can.