Home / Parts / AR15 Parts / Mil-Spec Castle Nut Mil-Spec Castle Nut$599 98 in stock Mil-Spec Castle Nut quantity Add to cart SKU: CAST-INV-CPA-0241 Categories: AR10 Parts, AR15 Parts Tag: Castle Nuts Product ID: 3410 Description Additional information Description Mil Spec Castle Nut Additional information Weight 0.6 oz Related products Crown Precision Arms Trigger – Straight $19999 Muzzle Device 3 $14999 Crown Precision Carbon Fiber 15″ Hand Guard AR15 $31999 Crown Precision Carbon Fiber 15″ Hand Guard with Top Rail $38999