Duality Arms KRISS Vector Mamba

The Duality Arms KRISS Vector Mamba is the simpler, cheaper sibling of the RATL-R. Where the RATL-R swaps in a three-position selector cam, the Mamba keeps the factory cam and gives two functional positions, safe or Mamba, while assisting the trigger reset off the Super V bolt travel. Duality is blunt about what it is: nothing fires on its own, nothing overrides the safeties, and the shooter is always in control at one round per trigger pull.

Installation is deliberately minimal. Duality instructs owners to leave the factory selector cam in place, add no shim, and leave the safety bar block installed. That keeps the parts count and the fitting work lower than the RATL-R, which is the point of the Mamba. The install voids the KRISS factory warranty, orders ship on a one-to-two week lead time, and Duality caps orders at five units.

The Mamba is the pick when you want Vector reset assistance without the cost or the added cam of the RATL-R. Duality does not publish generation or caliber fitment for the Mamba on its product page, so confirm your Vector generation and chambering with the maker before ordering. As with any reset-assist device, legality is state-specific and evolving; verify current federal, state, and local law first.