This is what, the .223 necked up to .30 caliber?
7.62x35,,,,,the BIG BONUS is with an AR platform, the bolt carrier group, upper receiver, and standard AR mags,...STAY THE SAME!!!
All that is needed is a barrel change.
Remington has the market on ammo right now, ableammo.com has 20rds at $18.

But, for the price of these uppers,. add a bolt and standard AR mag, and even capacity stays the same.
The muzzle energy is boosted, although the fps is slower than a 5.56/.223, it has more of a thump than the "poodle shooter"....
The .300 Whisper has been around for some time, but as the precious posts here about the .300 Blackout can attest to, it is an option without, a different mag, receiver, barrel,even lower in some cases, and an even more pricey ammo like the 6.5 and 6.8.
I was just going to get a 300 complete upper and a moderate pile of ammo....For the bigg(er), nastier variety of zombies..
