I have had a M98 custom for about 2 years. i love the gun and have no problem with the stock barell. Im just wondering what the difference is between a 12 inch barrell and a 18 inch barell? besides the length what does a longer barrell offer? longer distance shooting? more accuracy? Ive been thinking about getting a Dye Boomstick or a flatline. If i get a Boomstick im not really sure what size to get. Anybody know a lot about barrels? Id appreciate some help on choosing the right barrell.