Update! After just completing my Brass Breech Retaliator on a 5kg spring and hitting 130 and 140fps, I've now dropped in a 8kg Black Tactical spring. Its now hitting the 140 and breaking the 150fps mark!!! Always make sure you wear safety glasses when playing Nerf.
Facebook: https://www.facebook.com/blastertech
Website: http://www.blastertech.com.au/