This is one nice AR! It makes my second Bushmaster and third personal AR in all. Plus the ones I've been issued in the Army.:) How do you guys think the Bushmaster brand rail handguard stacks up againt the others? How do I remove it if I'd like to clean under there too? Lastly, why did it only come with one sling swivel? I have no way to attach the sling on one end unless I loop it through the stock and put the swivel on the front end.