Rcbs Universal Primer Arm 2

The RCBS Universal Primer Arm 2 is a precision primer seating component designed for reloaders who demand fast, consistent ammunition assembly. This primer arm fits Rock Chucker II, JR, Reloader Special, and most C-frame presses, making it one of the most versatile primer seating solutions in handloading. The design accommodates large and small rifle primers as well as large and small pistol primers, allowing shooters to prepare multiple calibers without changing equipment.

Size conversion is engineered for speed and simplicity—changing between primer types takes less than 60 seconds, eliminating downtime during high-volume reloading sessions. The arm comes complete with all necessary primer plugs and sleeves for all four primer categories, meaning no additional purchases are required to handle any standard primer configuration. This integrated approach reduces operator error and ensures repeatable, uniform primer seating depth across batches, which directly impacts ignition consistency and ballistic accuracy.

Serious reloaders—whether preparing precision rifle ammunition, defensive pistol rounds, or high-volume practice loads—rely on the RCBS Universal Primer Arm 2 to streamline workflow without sacrificing primer seating quality. The compatibility with multiple press models makes this an economical upgrade for shooters already invested in RCBS or compatible C-frame equipment. Note that this primer arm is not compatible with the Rock Chucker Supreme model.