King of the North 2018 Tournament Fundraiser- Dynamic Discs Opto Ballista Pro 173-176g. Available in Red with White stamp. Thank you! Ballista Pro is the big brother to the Ballista, with added stability for experienced players. It is the perfect solution if you are looking for a distance driver that can navigate tight fairways. With a great combination of speed, stability and glide it is the go-to disc for all kinds of distance shots.