Forster Co-Ax Press Primer Seater Assembly

• Co-Ax compatibility: Built specifically for the Forster Co-Ax Press, this primer seater assembly restores the press’s original priming function and keeps the seating system matched to the press geometry for smooth, repeatable operation.
• Consistent primer seating: The assembly is designed to seat primers squarely and with controlled depth, helping support more uniform ignition and reducing the chance of uneven seating during case preparation.
• Steel construction: The steel body is suited to repeated bench use, giving this small but critical press component the durability needed for regular reloading work.
• Simple replacement part: As a dedicated replacement assembly, it is a practical way to return a worn or missing priming component to service without replacing the entire press or improvising with non-matching parts.
• Made in USA: Built in the USA, this assembly follows the same product philosophy as Forster’s precision reloading tools, making it a natural fit for reloaders who want original factory parts on their bench.

About the Co-Ax Series

The Forster Co-Ax series is the company’s best-known line of press-based reloading tools, developed for reloaders who want precise die alignment, smooth leverage, and repeatable results at the bench. Within Forster’s lineup, the Co-Ax system sits alongside the brand’s dies, case trimmers, and measuring tools as part of a broader precision reloading approach. Rather than focusing only on raw leverage, the Co-Ax design is known for how it supports straight-line case and die alignment during key loading steps.

In practical use, the series appeals to handloaders building accurate rifle ammunition, careful hunting loads, and other ammunition where consistency matters from case prep through bullet seating. The Co-Ax platform is also valued for its modular serviceability: important working parts such as jaws, priming components, and related assemblies can be replaced as needed to keep the press functioning as intended. That makes the series especially relevant for reloaders who use one press for multiple operations and want to maintain the original feel and consistency of the system over time.

About the Forster Co-Ax Press Primer Seater Assembly

The Forster Co-Ax Press Primer Seater Assembly is a dedicated replacement part for the priming function of the Co-Ax Press. Its role is straightforward but important: it positions and seats the primer during the priming stage, helping the press deliver the controlled, square seating action that Co-Ax users expect. For reloaders maintaining an older press, replacing this assembly is often the most direct way to restore proper priming feel and dependable operation.

Because this component is made specifically for the Co-Ax system, it preserves the original relationship between the press linkage and the primer seating mechanism. That matters in practice because primer seating is one of the most tactile steps in reloading. A correctly fitted assembly helps the operator feel the primer enter the pocket cleanly and stop consistently, which is useful when preparing ammunition where ignition uniformity is a priority. In a bench setup focused on careful case preparation, that kind of repeatability is more valuable than simply forcing a primer into place.

The assembly’s steel construction suits the repeated contact and pressure of routine priming work, while its compact format makes it easy to keep as a service part for an existing press. For reloaders who rely on the Co-Ax platform, this is the kind of original component that helps keep the press working the way it was designed to work.

About Forster

Forster Products dates its history to 1935 and is based in Lanark, Illinois. The company states that its products are made in the United States, and it has long focused on tools for precision handloading and related gunsmithing work. That specialization is reflected across product lines such as reloading dies, case trimmers, headspace gauges, and sight-mounting fixtures.

Within that catalog, the Co-Ax Press is one of Forster’s established reloading products and fits the brand’s broader emphasis on alignment, repeatability, and bench precision. The company is also known for seating-die designs that use a close-fitting chamber to help align the case and bullet during seating, showing the same attention to controlled cartridge assembly that makes its press accessories and replacement parts relevant to serious reloaders.

Main Features

• Manufacturer: Forster
• Product: Co-Ax Press Primer Seater Assembly
• Made in: USA
• Material: Steel
• Weight: 5.00 g
• Color: Silver
• Application: Case preparation

Warranty

Forster backs this product with a 2-year warranty. That period suits its role as a precision replacement component for bench reloading equipment and supports long-term maintenance of the Co-Ax press system.