This New Microtech 251-1 Halo VI S/E Drop Point OTF Automatic Knife Black Plain Edge. This a 11" Halo VI single edge black plain edge blade is thick and sturdy firing. The action on these is fast, they hit hard, and the lock-up is excellent. This Halo VI knife has a M-390 black finished steel drop point blade with a plain edge. The 6061-T6 aluminum frame and charging handle are black anodized and the hardware is bead blasted. Date 06/2018 HALO VI.