300 Blackout by Travis Haley

[Hoser]

The 300 Whisper is a pretty cool little round.

I have been shooting them a lot these past few years and am very happy.

I wont abandon 223 by any means, but if you want a little more oomph the 300 Whisper/Blackout/WTF is a great choice.

[Cylinder Head]

If the gun is integrally suppressed and designed around the round, I would say its worth every penny.

[dwalker460]

and of course full-auto...

[Singlestack]

Interesting that Haley was using a Spikes Compressor. It was one of the few 300 BLK ARs that operated without any malfunction firing suppressed, unsuppressed, supersonic, and subsonic in a review of 10 or so models I saw a few months ago.