Home / AR Lower Components / ERGO CASTLE NUT 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 Out of stock FORWARD CONTROLS DESIGN EMR-A ENHANCED MAGAZINE RELEASE AMBIDEXTROUS SERRATED EXT LEVER $66.50 Read more Out of stock SIONICS Lower Parts Kit – Deluxe – Single Selector $99.95 Read more Magpul Enhanced Trigger Guard, Aluminum – AR15/M4 – Black $21.80 Add to cart Out of stock Vltor A5 Receiver Extension Tube $49.46 Read more