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… Out of stock LBE UNLIMITED CASTLE NUT $8.99 Read more Related products Out of stock Magpul Enhanced Trigger Guard, Aluminum – AR15/M4 – Black $21.80 Read more SOLGW AMBI SAFETY SELECTOR KIT $33.25 Add to cart Magpul ASAP – Ambidextrous Sling Attachment Point $30.35 Add to cart Bravo Company Manufacturing MIL-SPEC Carbine Stock Hardware Kit $57.95 Add to cart