I sent an email to accuracy systems about getting my mini rebarrel for 300 blackout .
they replied they can do me a 16 inch barrel and thread it to 5/8 x24 to fit the 7.62 suppresor I am getting ready to purchase .
I have a spare upper reciever and a completed lower for the ar 15 platform all I would need would be to replace the barrel , but Im thinking I would like to be a bit different and the mini should be more than capable especially if I have them add an adjustable gas block.

What would they charge? One could convert any AR to 300 Blackout for $175 and 30 minutes of work using very basic tools. Sometimes being different becomes impractically expensive, though I think a 300 BLK Mini is a cool concept.

I dont know yet what they will charge but I would expect it to be close to there other barrel swap packages . 700.00 on up.
I have a complete lower and a donor upper plus action block , barrel nut wrench , spare gas block and a spare carbine length gas tube . I have thought about going form 1 on the lower and building a 11.5 inch 300 but I think a mini would definatly stand out among the crowd.
I also have a 16 inch barrel laying around I might just build up a carbine and sell it to fund the mini project.

Why would anybody want this over 7.62x39? Want to buy more expensive ammo that is basicly the same as x39 in performance? Really, I don't see any reason to choose this chambering.

I agree 100%. I dont see the point.

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well to be honest I owned a couple of mini-30s and I wasnt impressed .
second simply because I want something different . sure I could build one on an ar 15 platform for around 200.00 but what fun would that be when everybody else already has done that?

The .300 blackout makes sense in a AR but only because of the quick change feature because of the parent case, same bolt, same mag, bigger hole. I agree with everyone else, get a mini 30

The 580 & 581's are much improved over the old garbage mini 30's. My unmodified 581 will do 2.5 MOA with handloads and 3.0 MOA with Silver Bear and Yugo surplus. Not tackdrivers to be sure, but not bad. I've heard of guys getting 1 MOA with gundoc modifications (Trigger,bedding). Don't throw your money away unless you really have it to burn.

If you really want to do something different the 6mm/.223 looks pretty interesting and practical since you can use cheap .223/5.56 brass for reloads. Also higher velocity and BC than the .30 cals & 6.8. ( In the mini platform). I been thinking about that idea for a while.

Good luck

my thought would be , why not the 7.62x40 WT ? A better cartridge for hunting, more velocity, more energy, same caliber. Ammo from Wilson Combat, but some what easy to make from .223 cases.

Cool, please keep us posted!

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-- mini's are great rifles, the firing pin is the only weak link.
-- So, to be safe, never buy a used mini (you can never really tell how many rounds had been fired by the firing pin)

I already have one weapon that is pretty much a one dog show , the 458 socom. while the wilson is interesting the 300 blackout is supported by the freedom arms corportaion , they have ammo , manufacturing abilities and an accepted industry standard . I have a ton of 223 brass to form case's and more 308 bullets than hogan has goats. my intrest is suppressed fire and I think other than suppressing the 458 socom this would be my best route . I have a 308 ar for stretching it out and if I want to go light weight I will just use one of my 5.56 ar15 rifles with barnes 70 grain tsx bullets. to me 6mm any cartridge is a solution looking for a problem.
I will pursue this and see if it is with in reason , if not I have a spare upper reciever and lower I can put together and my mini will just be my I dont care im having fun gun.