[itsahoot]

Manufacturers already make AR style rifles chambered in 300 Blackout.

Interesting cartridge, what do those rounds sell for? I have Ruger 9 mm carbine for fun.

[T.B. Yoits]

Prices range from about $.75 to $1.05 per round.

https://www.luckygunner.com/rifle/300-blackout-ammo

https://palmettostatearmory.com/300-blackout-ammo.html