I recently purchased a Marlin X7 in .308 Winchester and have a cheap $7 sling on it that I have had since I can remember. It is a little Wally-World cheapo and I don't really want to keep that particular sling on that rifle. I am looking for something around $40 or less, with quick adjust, and won't slip off my shoulder while I'm in the woods. I would also like for it to assist in shooting from a standing, unsupported position if possible. I am open to all suggestions for slings that meet my first 3 criteria, and if it meets the 4th then bonus. Slings that are way over budget or of a "tactical" nature for AR style weapons are NOT what I'm looking for. Thanks in advance for your feedback.