I recently had occassion to contact D.P.M.S. service..regarding a very straight forward question about one of their lower receivers.. I will say their response was very timely.. However..they did not answer my question..and the response was quite unprofessional..evidenced a complete disregard for customer support..and was..in fact..quite curt..if not smart ***ed.. I replied..stating as much..and again asking for the very simple information.. I received a second email..which was even shorter..and showed an absolute dis-interest in my query.. That being said..I will NEVER own another product of any kind..with which their name is associated..and I would highly recommend that no one else does.. Fortunately..there are more than enough companies out there..who actually wish to take care of their customers..without resorting to doing buisness with this company..