Feisol Ball Head CB-50DC carbon fiber with quick release plate. These are a great, smooth operating ball head that won’t break the bank.
It features a friction control so you can fine tune the stiffness of the ball head, 360 degree panning that is separate from the ball head, and can easily hold a 50 lb rifle.
I've been using this ball head with the Feisol CT-3342 tripod for a few weeks now and I'm very impressed. I've mainly had a vortex razor hd 85mm spotter on it and it is very smooth and easy to use. Locks down solid and the pan function is great. Overall seems like a high quality product for a great price.