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The Knight's Armament Barrel Extension Action Wrench (KAC PN: 30447) is KAC's purpose-designed action wrench for removing and installing barrel extensions on SR-15, SR-25, and other KAC platforms. This specialized tool is required for proper barrel extension installation and removal on KAC's barrel nut system, ensuring correct torque application without damaging the receiver or extension. A must-have for KAC-authorized armorers, gunsmiths, or dedicated owners performing barrel work on KAC rifles.