Built from a MIL-SPEC foundation with HP/MPI-tested and certified bolt and M16-style bolt carrier group with mid-length gas system and H buffer, the TAC3 upper performs reliably. Superior accuracy and performance come from the company's signature chrome-lined, cold hammer-forged barrel made from FN proprietary steel, fully free-floated within a Hodge Defense designed wedge lock handguard. The rigid handguard, affixed with a proprietary barrel nut and anti-rotation technology, provides continuous 12 o'clock rail space and multiple M-LOK attachment points for lights, lasers and other accessories while minimizing deflection during hard use. Outfitted with an ambidextrous charging handle, the FN 15 TAC3 upper receiver is ready to drop in on any MIL-SPEC AR-15 Lower.