This is the type of reply I would expect from you concerning your product. Unfortunately, my testamony to the failiers and randome runaway's I've wittnessed, are all first hand and I even had the oportunety to personally inspect one of the weapons after the incedent, and saw no problem with the sear or any other part of the factory lower. As for ammo used, I believe the opperator was useing 115 grain Winchester in the white box. In addition, I have also seen a number of other reliability issues associated with the use of your uppers. If it were my call, I would ban the use of your uppers at ou