I’m selling my FDE DD MK 18 Upper with SF 4 prong FH for $950 shipped. The upper comes with the factory BCG and charging handle but it doesn’t include BUIS “they didn’t come with pistol when I bought it” but I can throw in a matech buis to sweeten the deal. I take PP plus 3% or USPS MO. If you want pictures send me your e-mail or phone number.