The TechT Gamma Pro Kush Delrin Bolt also includes 4 SOFT TIP INSERTS that all produce difference firing characteristics and sound signatures. These four tip inserts will also work with the stock gamma pro bolt.
The Four Soft Tips are:
Stock PE Style 3 Spoke Tip = Very similar to the Stock Planet Eclipse Soft Tip Inserts, but slightly softer.
Skinny 3 Spoke Tip = 3 skinny spokes that allow for faster airflow to the ball.
Venturi Tip = Has 6 holes and slows the airflow down slightly. Great for brittle paintballs.
Open Face Tip = Cushions the ball, and provides maximum airflow speed to the ball.