Forster Quick Change Jaw Assembly S-SMALL (0.343"-0.422")

• Quick-change assembly: Replaces one side of the Co-Ax shell holder jaw setup as a complete aligned unit, so caliber changes are faster and there is less need to disassemble small internal parts.
• S-Small rim range: Designed for case rims from 0.343" to 0.422", giving proper fit for the smaller end of the standard S jaw format used on the Co-Ax Press.
• Spring-loaded case support: Works with the Co-Ax jaw system that supports the case at the base of the cannelure, helping provide positive extraction and smooth case handling during press operation.
• Self-acting jaw function: The jaw design opens and closes with the press cycle, which speeds repetitive loading steps and lets the case release automatically when the handle is raised.
• Steel construction: The steel body suits repeated installation and removal, making it a practical press accessory for reloaders who switch between compatible case-head sizes.

About the Co-Ax Series

Forster’s Co-Ax series is built around a different shell-holding concept than conventional single-stage presses. Instead of relying on caliber-specific shellholders for every cartridge, the system uses spring-loaded shell holder jaws that automatically open, close, and release the case during the loading cycle. This design is intended for reloaders who value efficient setup changes, consistent case alignment, and smooth handling at the press.

Within the Forster lineup, the Co-Ax Press is one of the company’s best-known reloading products, aimed at precision-minded handloaders as well as users who want a cleaner, more streamlined workflow at the bench. The jaw system is a key part of that approach: standard S jaws cover a broad range of common case rims, while optional configurations extend compatibility to very small or very large case heads. Quick-change jaw assemblies build on that idea by letting the user swap a complete aligned jaw side rather than taking apart the standard jaw arrangement. The result is a modular press platform that emphasizes repeatable operation, reduced setup frustration, and practical adaptability across multiple cartridge families.

About the Forster Quick Change Jaw Assembly S-SMALL (0.343"-0.422")

The Forster Quick Change Jaw Assembly S-SMALL is a dedicated Co-Ax Press accessory for cartridges with rim diameters from 0.343" to 0.422". It is intended for reloaders who move between case sizes and want to shorten changeover time without giving up the floating, self-centering jaw system that makes the Co-Ax press distinctive. Instead of disassembling the shell holder jaws and managing individual parts, this assembly lets one side be replaced as a complete unit, which simplifies setup and helps keep the jaw alignment consistent.

In practical use, that matters most when loading several compatible cartridges in one session or when alternating between jaw orientations that would otherwise require more bench time. The Co-Ax jaw system supports the case with spring-loaded contact at the base of the cannelure, which helps with positive extraction and controlled case handling through the stroke. Because the jaws are self-acting, they open and close as the press is operated and release the case automatically when the handle is raised, keeping the loading rhythm smooth.

Its steel construction suits repeated installation and removal, while the compact 5.00 g weight keeps it a small, purpose-built addition rather than a bulky conversion part. For reloaders using the standard S jaw format on the Co-Ax platform, this S-SMALL assembly is a straightforward way to keep caliber changes efficient while preserving the operating feel of the original press system.

About Forster

Forster Products dates its history to 1935 and has long focused on precision reloading and gunsmithing tools. The company’s catalog includes reloading dies, case trimmers, headspace gauges, and sight-mounting fixtures, reflecting a product range centered on careful bench work and repeatable results. The Co-Ax Press is one of Forster’s established reloading products and remains closely associated with the brand’s approach to case alignment and press operation.

Forster is based in Lanark, Illinois, and states that its products are made in the United States. The brand is also known for specialized die designs such as its Bench Rest Seater Dies, which use a close-fitting chamber to help align the case and bullet during seating. That emphasis on controlled alignment and practical precision carries across the company’s reloading accessories, including Co-Ax press components such as these quick-change jaws.

Main Features

• Manufacturer: Forster
• Product type: Quick Change Jaw Assembly
• Size: S-SMALL
• Compatible rim diameter: 0.343"-0.422"
• Compatible with: Co-Ax Press
• Accessories for: Case preparation
• Material: Steel
• Color: Silver
• Weight: 5.00 g
• Made in: USA

Warranty

2 years. Forster specifies a 2-year warranty for this product.

In the Box

• Quick Change Jaw Assembly, S-SMALL