Smaller cylinder and piston eases trigger pull 25%, uses less paint. Shorter barrel for easier handling in brush. Leak seal keeps paint out of handle when gun is laid on its side. Two-piece piston rod permits repair on other parts without removing piston rod from gun or leather from cylinder. Reversible .021" diameter nozzle clears plugged gun. Just reverse nozzle, pull trigger. Nozzle cap keeps dirt out, stops paint drip and prevents dry-in when gun is idle.