HELP!!!! I am looking for my first rifle. I have used many but never actually owned one before. I thought after extensive research I had found the perfect choice for my needs, the Bushmaster M17S. My logic was that it is a clean machine so while I definitely intend to clean it after each use, in case of an emergency I would not have to worry about malfunctions if I for some reason had to go for a week or so w/o cleaning. Ammo's readily available and relatively cheap. I really liked the bullpup design (having a full length barrel ...