RCBS 9550 Universal Primer Arm-2 Small & Large Primers

The RCBS 9550 Universal Primer Arm-2 is a replacement priming arm built for RCBS Rock Chucker, Rock Chucker Supreme, and similar RCBS single-stage reloading presses, designed to seat small and large rifle and pistol primers from a single interchangeable arm.

Built around RCBS's quick-change primer plug and sleeve system, the Universal Primer Arm-2 lets you swap between small and large primers without pulling the arm apart. The included plugs and sleeves cover every common pistol and rifle primer size, and a flat return spring helps prevent tipped or mis-seated primers during the priming stroke.

Constructed from all-metal components with a clean silver finish, the 9550 is intended as a direct replacement for the original Universal Primer Arm on RCBS Rock Chucker-series presses, or as a second arm so reloaders can keep one set up for small primers and the other for large and avoid retooling between runs.