ive used del-ton, dpms, and rra. very small differences. all have a few thousand rounds through them with zero problems. the trigger, hammer and disconnector might be of slight difference between kits but rarely are lower parts the reason for failure. thats the beauty of the ar-15. many parts are simple and difficult to make poorly enough to be non-functional. really when it comes to lpk i just tell people to pick their preference. i mean if people like knights, who am i to tell them they are severely overpriced? if youre happy with it and it functions then it really doesn't matter if it was $50 or $350

