RCBS Universal Primer Arm-2 for Single Stage Press

• Universal press compatibility: The Universal Primer Arm-2 fits a wide range of classic RCBS single-stage presses and most C-frame presses, making it a practical way to restore on-press priming without changing the basic workflow of the press.
• Large and small primer support: Included primer plugs and sleeves for large and small rifle and pistol primers let one tool cover common loading tasks, reducing setup changes between calibers.
• Fast primer size changes: Switching between primer sizes takes less than 60 seconds, which helps keep a loading session moving when alternating between different cartridge families.
• On-press seating feel: Press-mounted priming gives direct mechanical feedback through the press handle, helping the reloader feel primer seating depth and maintain consistent results.
• Made in USA construction: Domestic manufacture aligns with RCBS's long-standing focus on durable reloading equipment and makes this accessory a natural match for established bench setups built around RCBS presses.

About the Universal Primer Arm Series

The RCBS Universal Primer Arm family is built for reloaders who prefer on-press priming on traditional single-stage equipment rather than using a separate hand or bench priming tool. Within the RCBS lineup, these accessories serve shooters who value a simple, direct priming method that keeps case handling to a minimum and preserves the familiar rhythm of a single-stage press. The concept is straightforward: add a dedicated priming arm to the press so primers can be seated during the loading cycle with the leverage and feel of the press itself.

That approach suits reloaders who want consistent primer seating, a compact bench setup, and compatibility with established RCBS press platforms. The series is defined by practical features rather than complexity, including support for large and small primers and quick conversion between sizes. Instead of adding extra mechanisms, the design focuses on dependable fit, straightforward installation, and repeatable operation. For owners of classic RCBS presses and similar C-frame designs, the Universal Primer Arm remains a useful accessory category because it extends the capability of the press while keeping the loading process familiar, controlled, and mechanically simple.

About the RCBS Universal Primer Arm-2 for Single Stage Press

The RCBS Universal Primer Arm-2 for Single Stage Press is intended for reloaders who want to seat primers directly on the press with a familiar, controlled stroke. Rather than moving cases to a separate priming station, this accessory keeps the operation on the press, which can make the loading sequence more efficient and reduce unnecessary handling. That is especially useful for reloaders working in batches on a single-stage press where a clean, repeatable routine matters as much as output.

Its main advantage is flexibility. The unit includes primer plugs and sleeves for large and small rifle and pistol primers, so it can cover common cartridge types without requiring separate priming tools for each size. RCBS also designed the size change process to take less than 60 seconds, which is a practical benefit for benches that switch between small-primer pistol ammunition and large-primer rifle loads. In use, the press handle provides clear seating feedback, helping the operator feel when a primer is fully seated.

Compatibility is another strength. The Universal Primer Arm-2 fits Rock Chucker, Rock Chucker II, JR2, JR3, Reloader Special, and most C presses, making it particularly relevant for owners of established RCBS equipment who want to maintain original press functionality. For reloaders who prefer a simple mechanical solution over a separate hand priming tool, this accessory offers a compact and practical way to add fast, accurate primer seating to a single-stage setup.

About RCBS

RCBS was founded in 1943 by Fred T. Huntington in Oroville, California. The company name came from Rock Chuck Bullet Swage, the original bullet-swaging die that started the business. From those beginnings, RCBS developed into a specialist in ammunition handloading equipment, with a product range that includes presses, dies, shell holders, powder measures, and priming tools.

RCBS remains closely associated with rifle and pistol cartridge reloading and has long been known for producing equipment for single-stage, turret, and progressive loading systems. The brand became part of Hodgdon Powder Company in 2024 after its sale by Revelyst. For products such as press-mounted priming accessories, RCBS is particularly relevant because its history is rooted in practical bench tools designed around repeatable operation, durable construction, and compatibility across established reloading platforms.

Main Features

• Manufacturer: RCBS
• Product type: Primer arm for single-stage press
• Accessories for: Presses
• Compatibility: Rock Chucker, Rock Chucker II, JR2, JR3, Reloader Special and most C presses
• Primer sizes supported: Large and small rifle and pistol primers
• Size change time: Less than 60 seconds
• Made in: USA
• Color: Silver

Warranty

The RCBS Universal Primer Arm-2 is covered by a 2-year warranty.

In the Box

• RCBS Universal Primer Arm-2
• Primer plugs for large and small rifle and pistol primers
• Primer sleeves for large and small rifle and pistol primers