Simply, Vulcan Armament is just another trasformation from the original Hesse Arms which pretty much sucked. I forgot why, but almost all the Hesse Arms recievers were all defunct and needed to be replaced constantly. Basically Hesse changed to Vulcan Arms then to Vulcan Armament. Same crappy quality, but cooler sounding names. So recommend you stay the hell away from vulcan, no matter how good the prices sound.