The Yankee Hill Machine Company Black Diamond Specter XL 5.56 Carbine upper receiver has a chrome lined 16" fluted barrel with a 1:7 twist and carbine length gas system. The barrel is made out of 4140 Steel which is heat treated to RC 25-32. The upper has a free floating YHM Rifle Length Diamond Handguard does not have a gap between the upper receiver and hand guard and is marked for position on all 4 sides. The diamond pattern in the hand guard reduces weight and blends perfectly with the Diamond fluted barrel. Bolt carrier group, charging handle, YHM Forearm Mounted Flip Front Sight, YHM Flip Rear Sight and YHM Phantom 5C2 Flash Hider / Compensator included.
- 16" 4140 Steel Barrel, Heat Treated to RC 25-32
Aid in Barrel Cooling
- YHM Phantom 5C2 Flash Hider / Compensator
- Forged 7075-T6 Flat Top Upper Receiver with M4 Feed Ramps
- YHM Rifle Length Diamond Handguard (YHM-9635-DX)
- YHM Forearm Endcap (YHM-9484-A)
- YHM Low Profile Gas Block (YHM-9384)
- YHM Forearm Mounted Flip Front Sight (YHM-9627)
- YHM Flip Rear Sight (YHM-9680)
- Forward Assist
- Includes Charging Handle
- Includes Bolt Carrier Assembly
- Total Weight: 4.8 lbs.