I went and shot my new Gen 4 Glock 34 today. It shot maybe an inch low at 20 yards. The rear adjustable sight was centered so i can raise or lower the rear a little. My question is... I want a dawson fiber optic front sight only. Should I get the .160 sight hieght since my stock front sight is .160? I see a lot of people using .215 hieght front sights, but afraid with the stock rear it would shoot way low.