First you need some brass (I picked this up at the range) -
Then one of these -
http://www.youtube.com/watch?v=FKVc3m2D5YA&feature=related
And of course one of these -
http://www.youtube.com/watch?v=SGYLmHvKVd0&feature=related
Then one of these -
http://www.youtube.com/watch?v=FKVc3m2D5YA&feature=related
And of course one of these -
http://www.youtube.com/watch?v=SGYLmHvKVd0&feature=related