Part BP2889B Large Primer Arm Assembly for products. Primer Arms BP2889 A + B are used on the 90588 - Breech Lock Challenger Press, 90928- 4-Hole Value Turret Press (only the red based version produced from 2006 to 2017), 90064 - Classic Turret Press and the 90998 - Classic Cast Press. These Primer Arms would be interchangeable between any of these presses.
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