Noveske N4 Light Recce, LO-PRO Upper 223 Rem 5.56mm NATO 16" 1:7 Hammer Forged Black Quad Rail Mid Length Flat Top U-LRLP-556

Specifications and Features
16" Cold Hammer Forged 5.56mm Barrel --M249 Machine Gun barrel steel and Chrome Lining (appx. 2 times as thick as an M4 or M16)
Extended Feed Ramps
Same weight as M4 barrel with improved contour for maximum rigidity and no M203 notch
MP HP tested
1 in 7" twist
Mil Spec Phosphate finish
Mid length gas system
1/2x28 threads
Low-profile gas block pinned to barrel
Forged Vltor MUR upper receiver featuring an anti-rotation interface with the handguard
11" free floated handguard w/ 1913 rails
Shot peened and MP tested bolt
Auto carrier with properly staked carrier key
Gun Fighter Charging Handle
Blackout Flash Suppressor
Back up iron sights not included
Upper Weight: 4 3/4 lbs