YHM AR-15 Specter XL Black Diamond Upper Assembly in Detroit, Michigan For Sale

YHM AR-15 Specter XL Black Diamond Upper Assembly
MSRP: $995; asking $950
Specifications:
? Upper Receiver: A3 Flat-Top, Forged xxxx-T6 Aluminum
? Barrel Length: 16"
? Barrel Contour: Medium, Diamond Fluted
? Barrel Material: xxxx Chrome Moly Steel
? Muzzle Thread Pattern: 1/2"-28
? Barrel Finish: Parkerized
? Twist Rate: 1 in 9"
? Chamber: 5.56x45mm NATO
? M4 Feed Ramps: Yes
? Muzzle Device: YHM Phantom 5C2 Flash Hider
? Gas System Length: Carbine
? Gas Block Diameter: 0.750"
? Handguard: YHM Diamond Series, Rifle Length, Free Float
? Sights: YHM Handguard Mounted Flip-Up Front, YHM Flip-Up Rear
? Weight: 4.8 lbs
Source: http://www.armslist.com/posts/xxxx138/detroit-michigan-rifles-for-sale--yhm-ar-15-specter-xl-black-diamond-upper-assembly