Have you looked into 90* trigger boxes though? I would take those into consideration as well. For $170, you can get a Laylax orange piston (worth $55), and the z-trigger, with its super light trigger pull and unbreakable sears. Definitely worth it, because where you might save money in the short term run, soon, the trigger box will probably break, where the only option is to buy a new trigger box, which will cost more and more money, until you just wish you saved the hassle and bought something worth your time to begin with.