Lyman Universal Priming Arm for T-Mag & Crusher Presses. Priming Arm from Lyman supplied with two priming sleeves (large and small). In our store you can also find a huge selection of Lyman Gunsmith and Reloading Equipment and other great Lyman products. For more Gunsmith and Reloading Equipment please visit our Gunsmith and Reloading Equipment store sections. Specifications for Lyman Universal Priming Arm for T-Mag & Crusher Presses: Manufacturer: Lyman Fabric/Material: Aluminum and Steel Package contents: Lyman Universal Priming Arm Lyman Universal Priming Arm for T-Mag & Crusher Presses