Up for sale is a Yankee Hill Machine Black Diamond Specter XL Carbine Upper. Purchased roughly a year ago maybe less. Less than 750 rounds through it. Never any steel, aluminum, or surplus ammo. Usually Hornady or Federal. Cleaned after every outing. Has a 16 inch fluted 1/7 5.56 barrel. Yankee Hill Phantom flash hider. Comes ready to fire. Just got this back from the factory (was having some feeding issues so I sent it in turned out it was my fault none the less though they completely retorqued everything back down to specs and went through a thorough testing) so everything is on there very very tight. It does have a few beauty marks. It loves 62 grain TAP ammo. I'm selling because a friend offered me a deal on his upper and I'd hate to pass it up. Asking 750 plus shipping. If you want insurance we can work something out. I will provide a tracking number as soon as its available. Any questions (im sure im leaving something out) feel free to ask. Paypal only.