THIS KIT IS EVERYTHING YOU NEED TO BUILD AN AR-15 EXCEPT A STRIPPED LOWER. The flat top M4 Mil-Spec upper receiver are forged CNC Machined from 7075-T6 Aluminum, the hardest and most durable material of any upper! To ensure even more strength they are hard coat anodized. The 16” straight fluted .223/5.56 Wylde barrel is the perfect marriage of design and precision! The Wylde stainless steel barrel fires 5.56 or .223 ammo in less than 1” groupings at 100 yards! This heavy barrel is made fr – [READ MORE BELOW]