[citation needed] The Vector uses an articulated mechanism referred to as the "Kriss Super V", which allows the bolt and an inertia block to move downward into a recess behind the magazine well.[9] The theory is that at the end of this travel, the energy is transmitted downward rather than rearward, thus reducing the felt recoil.This is intended to reduce muzzle climb when combined with the off-axis bolt travel, though it also greatly raises the sight line in comparison to the bore axis.The Vector is split into two major assemblies in a similar manner to the AR-15 rifle, secured together with four push pins.Due to the weapon's unusual layout, the lower contains the action, charging handle, magazine well and barrel, while the upper contains the ejection port, rail system, pistol grip and fire control components, as well as the stock for configurations that have one.It was later replaced by the improved Gen II version which features a redesigned pistol grip and trigger and has the swing angle of the safety lever reduced from 120 to 45 degrees.It features a 5.5-inch barrel (with an option of a 6.5-inch barrel on the Gen II version), a folding stock, flip-up Midwest Industries back-up iron sights (BUIS) (KRISS Sights on Gen II weapons), a full-length Picatinny rail for mounting various optics/scopes, and either two mode fire selector (single and full-auto) or a three mode fire selector (single, two-round burst and full-auto).
KRISS Vector CRB Generation 1 with the stock folded, and standard barrel shroud (not a functioning suppressor)
KRISS Vector CRB 18.6 inch barrel (Canadian version)