Custom Shooting Technologies Providing a better product with innovative solutions, providing an uncompromising quality product, and finally providing absolute customer satisfaction. Contact Us CST CentriX-22 Semi-Auto Receiver $199.95 – $359.95 CST ClassX-22 Semi-Auto Receiver $199.95 – $344.95 CST CentriX-ELR Semi-Auto Receiver $204.95 – $364.95