This is a mute subject you could buy the most expensive lower there is and put the most expensive trigger system in it with a cheap or expensive BCG and a cheap barrel or a high dollar one and it makes no difference you could have a $40 red dot on it or a $400 red dot YOU SEE THE ONLY DIFFERENCE IS THE WAY YOU WORD IT THE ONLY THING THAT MATTERS IS DOES IT WORK AND ARE YOU HAPPY WITH WHAT YOU BUILT