Viper Sure Grip Soft-Tip Darts (16-Gram,Green) by Viper. Save 29 Off!. $17.99. Get a grip on your game with the colorful, high-tech GLD Viper Green Sure Grip Soft Tip Dart. The snug-fitting green barrel sleeve features a unique non-slip, sure-grip surface. And, with so many other interchangeable colors available, youll want to own them all! The Viper Sure Grip Soft Tip Dart is made in the USA.