Take a look around in the Gallery for ideas...cheap.
by Repoman (no login)
I gotta think this question has been address more times than ANYBODY cares to count...but I guess it is a valid question if you are just starting out.
I know people like to do things on their own,but IF it is in your Budget then you may want to BUY a complet trigger assembly from PPS,Punisher,Timberwolf,MadCustoms...ect.