New 940 Pro Autoloaders. Inside, you will find a durable gas system that allows for up to 1500 rounds between cleanings and a host of corrosion-resistant internal parts (boron-nitride coated gas piston, magazine tube, hammer sear, return spring tube; chrome-lined chamber and bore; and a stainless steel return spring). An enlarged/beveled loading port, elongated elevator, and anodized follower combine for smooth operation.