TechT Clamping Feed Neck for an Autococker. Are you looking for a durable clamping feed neck? Well look no further. Our feed necks are made in the USA, and come with a LIFETIME Warranty. Our feed necks are made out of the highest quality aluminum, and are some of the most highly trusted and used feed necks in the world. Our feed necks come with an insert to allow you to use all size loaders without sanding.