Why is it special? The flash suppressor is pinned and welded to a pistol length barrel, making the total overall length a legal 16 inches. Its a standard Yankee Hill YHM-7810 5.56 upper, BUT with a legal short barrel.
* Forged 7075-T6 Flat Top Upper Receiver with M4 Feed Ramps
and “T” marked
* Forward Assist
* Includes Charging Handle
* Includes Bolt Carrier Assembly
* <15″ 4140 Steel Barrel, Heat Treated to RC 25-32
Diamond Fluted to Improve Rigidity and Aid in Barrel Cooling
* YHM Phantom 5C2 Flash Hider / Compensator
* YHM Specter Length Diamond Handguard (YHM-9630-DX)
* YHM Forearm Endcap (YHM-9484-A)
* YHM Low Profile Gas Block (YHM-9384)
* YHM Front Flip Sight Tower (YHM-9394)
* YHM Flip Rear Sight (YHM-9680)
* Includes all Internal Parts
* Total Weight: 4.4 lbs.