There was speculation it was Aquila, Tippmann came out and directly said it wasn't. A google search brings up Cascade Ammo (CI) of Mexico, I don't know if that's accurate, but they do make a 1,050fps standard velocity, which matches the Tippmann standard velocity...on FPS anyway. Federal also makes a 1,050fps SV ammo. They do have their own head stamp, so that definitely makes it harder to figure out.