re: So tell me about the 300 blackout

If it isn’t suppressed, prob best barrel length is 14 inches with a pinned comp.
it will perform great with a good barrel.
Can use big bullets subsonic or lighter weight bullets loaded to about 30-30 ballistics. Has very little recoil.
Really a great round for a kids deer rifle out to about 150 yards or so.
I have an ar and an encore w a pistol barrel and a contender w a carbine barrel.
Shooting deer w the pistol and varmit bullets loaded hot is a hoot.
At 100 yards, sounds like you hit them w a baseball bat.
Really shines suppressed.
Good can on a ar sounds like a 22. On a single shot carbine or pistol is really nice.