Home / AR Lower Components / LBE UNLIMITED CASTLE NUT “GEISSELE MARITIME BOLT CATCH” has been added to your cart. View cart LBE UNLIMITED CASTLE NUT$8.99 6 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 Sons of Liberty Gun Works Blaster Starter Kit $54.15 Add to cart Magpul Enhanced AR Magazine Release $18.95 Add to cart Out of stock SIONICS Lower Parts Kit – Deluxe – Single Selector $99.95 Read more Out of stock SIONICS Receiver Extension Kit w/ H2 Buffer & Sprinco Blue Spring $99.95 Read more