Home / AR Lower Components / LBE UNLIMITED CASTLE NUT View cart “Magpul Enhanced Trigger Guard, Aluminum – AR15/M4 – Black” has been added to your cart. Out of stock LBE UNLIMITED CASTLE NUT$8.99 Out of stock Want to be notified when this product is back in stock? Notify me 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… Out of stock LBE UNLIMITED CASTLE NUT $8.99 Read more Related products Out of stock FORWARD CONTROLS DESIGN PF-40 TAKEDOWN AND PIVOT PINS $33.25 Read more Out of stock SIONICS Receiver Extension Kit w/ H2 Buffer & Sprinco Blue Spring $99.95 Read more GEISSELE MARITIME BOLT CATCH $29.00 Add to cart Aero Precision Enhanced Pistol Receiver Extension $35.99 Add to cart