Who makes the best parts kits? I'm in the beginning stages of building a rifle for Service Rifle competition, so I'm looking for the best quality, also at the best price. Are RRA and DPMS pretty much equal in quality? The parts will be going into a RRA lower along with a RRA 2-stage trigger (I'm gonna send the trigger off to John Holliger to do his magic on). Also, are all A2 stocks created equal, or should I look for a certain brand for that also?