Ask the Community

Yes, but It is generally not recommended due to safety, warranty reasons. Information here : http://www.thetruthaboutguns.com/2011/12/foghorn/ask-foghorn-is-it-safe-to-fire-300-whisper-in-a-300-aac-blackout-firearm/

Hi Marcus, Yes it will work no problem buddy.

here is a review that says you can fire a 300 blackout in the S&W 300 whisper http://www.guns.com/2011/11/03/smith-a-wessons-new-map15-in-300-whisper300-aac-blackout/