I'm currently looking to buy a monopod buttstock, adjustable cheek rest, and a bag rider for my M3. I'm also looking for a carbon fiber bottle with the valve and hose. My limit is $300 for the bottle, and as much as $100 for the buttstock, but I'd prefer a cheaper option. I don't want to spend much more than 45 each on the bag Rider and cheek rest. I would pay via PayPal