Out of stock Compare LBE Unlimited AR Castle NUT LBE Unlimited MSRP: $8.99 Now: $5.22 Was: Lbe Unlimited Castle Nut, For Ar-15, Manganese Phosphate Coated 4140 Steel ArcnutModel: Castle NutProduct Type: PartFinish/Color: Manganese Phosphate Coated 4140 Steel MSRP: $8.99 Now: $5.22 Was: Out of stock Compare