F Fortis LE Lightweight Enhanced AR-15 End Plate System - K2 - Castle Nut - Gold $42.70 - show more like this $8.99 Flat Rate or FREE over $175 AR15Discounts F Fortis Lightweight Enhanced AR-15 Endplate System Version K2 - Gold $52.20 LE-BLK-K2-GOLD show more like this Calculated in Cart Primary Arms