LAK, if the scope mount works for you, that is great, not putting anything down. But, a friend of mine has one of those scope mounts, the drill and tap one. The scope does not sit over the bore, it is offset to the left side of the rifle. That rifle was not designed to be scoped. You can do it, but by doing it, you are working around it's basic design which was to have iron sights. This is just my opinion, but I never understood people's desire to take military surplus rifles and make them into something they were never intended to be. There are a lot of terrific rifles out there for reasonable prices that were designed to do exactly what you want to do, why not use them instead of trying to ice skate uphill.
This guy says he wants to be a rifleman. He doesn't need to have to work around his equipment. Shooting is enough work when you have the right gear. Trying to make stuff work for things it wasn't designed to do presents another obstacle IMO.
The K31 is a great buy. It is a great rifle. The quality of it is equal to any rifle ever made. You can spend a lot of time enjoying that rifle and becoming a fantastic shot with that rifle. No need to modify it.
There have been a number of good books recommended in this thread already. Jim Owens has out a whole series of books that are good.
http://www.jarheadtop.com/
David Tubb is one of the greatest shooters of all time. His books and other good rifle books are available here:
http://www.zediker.com/tubb/tubbmain.html click on BOOKS at the top of that page.
I think that Guide to becoming a Rifleman by Fred is excellent as well as his Quick and Dirty AQT targets.
For the close in phase of your training, you can use standard pistol drills while shooting your rifle.
http://www.kuci.uci.edu/~dany/firearms/all_drills.html
Here is a dry firing page:
http://www.personaldefensetraining....hp&PHPSESSID=87a8d23b3b4a833f7377b2dc00e41b89
Here is a course of fire used by Marine Force Recon. This is the drill we started each day with at Gunsite Advanced Carbine with Pat Rogers as rangemaster:
http://www.personaldefensetraining.com/showpage.php?target=meu.php
Don't get hung up on drills that are designed for handguns: shoot them with your rifle. You can shoot them just as they were laid out for pistols for experience at close range or you can put the targets out further. For example, you can shoot the El Presidente' at 10 yards or you can do it at 100, 200 or whatever. Obviously a shot timer is a great thing to buy early on. Shooting at close range teaches you speed: how fast can you go and still maintain acceptable accuracy. Remember, if you are shooting for self defense, having a 1/4" group isn't going to gain you anything. Putting a couple shots into a 12" group COM in a fraction of a second is better. As you move back you will see that you need to slow down and pay more attention to marksmanship fundamentals. The only way you can know how fast you can go while still maintaining adequate accuracy is to get out there and do it. At 5 yards, you can make a precision head shot by using your front sight only and almost jerking the trigger. That same shot at 50 yards is going to require you to slow way down and have good sight alignment, sight picture, and trigger squeeze. As you move back you will find out how far away you are when you no longer have the skill to make a headshot with certainty. You will find out how far back you get before you need to switch from offhand to a steadier shooting postion etc.
Defensive like shooting is always a fine balance between speed and accuracy. You need to shoot as fast as possible, but not so fast that your accuracy becomes unacceptable. Training will show you your limits and will allow you to improve.
Here are a couple threads that I started that were similar to yours:
http://www.thehighroad.org/showthread.php?t=155209&highlight=Rifle
http://www.thehighroad.org/showthread.php?t=104021&highlight=Rifle