AIM 16" CHF .223/5.56 V-TAC 13 Upper Receiver V2.0

New AIM complete .223/5.56 caliber upper receiver groups featuring 16" Cold Hammer Forged Spikes Tactical barrels. Built using some of the finest components available (full specs below) and a pinned, Mid Length gas system. Includes complete HPT/MPI (unmarked) Bolt Carrier Group with NiB Carrier, Charging Handle and 13" Viking Tactics Handguard. Cold Hammer Forging of barrels has been known for decades to produce the most accurate, longest lasting rifle barrels obtainable. The Cold Hammer Forging of barrels is accomplished through intense hydraulic pressure applied at opposing angles by carbide steel hammers. During the hammering process, a mandrel is inserted into the bore while the carbide steel hammers shape the barrel around the mandrel creating the chamber, the lands, and the grooves. In addition to the aforementioned benefits, the Cold Hammer Forging process creates a defect free bore and the most consistent chamber possible. Additional Information: Barrel Length: 16" Barrel made by FN to Spikes Tactical Specs Manufacturing Process: Cold Hammer Forged Twist Rate: 1:7 Material: Chrome Moly Vanadium Outside Finish: Mil-Spec Heavy Phosphate Diameter at Gas Port: .750" Chrome Lined: Yes Barrel Extension: A4 Profile: Spikes Optimum Gas System: Mid-Length Barrel Caliber: 5.56mm NATO