Shop › PWS RATCHET LCK CASTLE NUT/END PLATE PWS RATCHET LCK CASTLE NUT/END PLATE $39.95 Primary Weapons Systems Mil-Spec, Ratchet Lock Castle Nut & End Plate Set, MOD 2, Fits Mil-Spec & Commercial size buffer tubes, Retail Packaging RLCN-KIT Quantity: Add To Cart Added! Primary Weapons Systems Mil-Spec, Ratchet Lock Castle Nut & End Plate Set, MOD 2, Fits Mil-Spec & Commercial size buffer tubes, Retail Packaging RLCN-KIT