GLD Viper Blue Sure Grip Soft Tip Dart 16-18 Gram Style: 18 Grams (20-0008-18) by Viper. $9.75. Get a grip on your game with the colorful, high-tech GLD Viper Blue Sure Grip Soft Tip Dart. The snug-fitting blue 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.. Save 61%!