Tacfire HG20-10:Tacfire has introduced a new series of AR-15 handguards - their A.C.E. series (Advanced Combat Engineering). Extruded from the highest grade of 6061-T6 aluminum & reinforced with an impervious Class 2 Type III Black Hard Anodized per military specifications, the Tacfire M-Lok handguards are leading the firearms industry with cutting-edge precision, along with a new era of innovative designs.