Home / AR Lower Components / ERGO CASTLE NUT You cannot add that amount to the cart — we have 1 in stock and you already have 1 in your cart. View cart “Magpul Enhanced Trigger Guard, Aluminum – AR15/M4 – Black” 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 Out of stock FORWARD CONTROLS DESIGN PF-40 TAKEDOWN AND PIVOT PINS $33.25 Read more Magpul ASAP – Ambidextrous Sling Attachment Point $30.35 Add to cart RADIAN WEAPONS TALON AMBIDEXTROUS SAFETY SELECTOR 45/90 DEGREES 2-LEVER KIT $64.95 – $69.95 Select options This product has multiple variants. The options may be chosen on the product page BADGER ORDINANCE Universal Safety Selector $58.00 Add to cart