IF IN FACTORY CONFIGURATION, The front sight is fixed and not adjustable. The rear sight is drift adjustable for windage changes - you need to loosen the set screw that holds the rear sight in place. From what I've found, it may take some doing to get that set screw loosened.
No, there was not.
msrp $436
Yes
adjust rear sight up for distance
$400 new
350$ to 420$
No. They are two different magazines
100-400 or so
You need the services of a gunmsith.
retail is about $399...Cabelas was selling the .45 for $299 on sale
About $250-$300, depending on condition, accessories, etc.
Depends on the firearm.