Any of you guys into precision shooting with pistols? If so, what type of sights do you recommend? What do you guys think of the factory adjustable Glock sights that come stock? I, myself, don't care for them all that much but then again maybe its the operator... I'll be shooting a Glock 17L and want to have the gear that allows me to shrink my groups as much as possible given I do my part... Any suggestions?