Home / AR Lower Components / LBE UNLIMITED CASTLE NUT View cart “Aero Precision Enhanced Pistol Receiver Extension” 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 Out of stock FORWARD CONTROLS DESIGN EMR-A ENHANCED MAGAZINE RELEASE AMBIDEXTROUS DIMPLED STD LEVER $66.50 Read more Bravo Company Manufacturing MIL-SPEC Carbine Stock Hardware Kit $57.95 Add to cart CMMG Parts Kit, AR15, Lower Pins and Springs $13.99 Add to cart Aero Precision Enhanced Pistol Receiver Extension $35.99 Add to cart