Home / AR Lower Components / ERGO CASTLE NUT “BADGER ORDINANCE Universal Safety Selector” has been added to your cart. View cart Out of stock ERGO CASTLE NUT$6.99 Out of stock Want to be notified when this product is back in stock? Notify me UPC: 810049123000 SKU: 4971-B Category: AR Lower Components Tag: ERGO Product ID: 37453 Description Description Standard Mil-Spec CAR castle nut Made from steel and coated black Fits AR-15/10 You may also like… LBE UNLIMITED CASTLE NUT $8.99 Add to cart Related products LBE Unlimited AR-15 Ambidextrous Sling Mount Receiver End Plate Steel Black ARAMEPL $9.95 Add to cart Out of stock BCM GUNFIGHTER QD End Plate $16.95 Read more Out of stock FORWARD CONTROLS DESIGN EMR-A ENHANCED MAGAZINE RELEASE AMBIDEXTROUS SERRATED STD LEVER $66.50 Read more Magpul Enhanced AR Magazine Release $18.95 Add to cart