It's a newer company, Specialized Tactical. They have been around for awhile, but haven't been real big or real flashy.
They built one of the first "Zombie Slaying" AR's for a charity event at SHOT in 2009 that raised like $8,000 for charities like Wounded Warrior Foundation, Unit Scholarship Fund and Navy Seal Fund.
I didn't get to see the weapon that they built for the auction, but I got to see some pictures well after the show and it was impressive at the time.
They did a complete zombie edition everything and it was awesome!
Since then they have made the decision to market a replica/remake of that rifle and I just caught their name again a few months ago after forgetting it.
The Original Zombie Slayer