Home / AR Lower Components / LBE UNLIMITED CASTLE NUT View cart “CMMG Parts Kit, AR15, Lower Pins and Springs” has been added to your cart. LBE UNLIMITED CASTLE NUT$8.99 2 in stock [] LBE UNLIMITED CASTLE NUT quantity Add to cart UPC: 765857617329 SKU: ARCNUT Category: AR Lower Components Product ID: 3663 Description Description AR15 Castle Nut 4140 Steel Mag Phosphate Finish MADE IN THE USA You may also like… LBE UNLIMITED CASTLE NUT $8.99 Add to cart Related products BCM GUNFIGHTER QD End Plate $16.95 Add to cart Out of stock SIONICS Lower Parts Kit – Deluxe – Single Selector $99.95 Read more Out of stock Magpul Enhanced AR Magazine Release $18.95 Read more Magpul ASAP – Ambidextrous Sling Attachment Point $30.35 Add to cart