Excalibur Mag Max Crossbow. Excalibur’s legendary design and technology produce the most rugged and reliable crossbow in its class. High-Output Limbs are the most efficient, reliable, and durable limbs on the market. CeaseFire Technology ensures the crossbow will not fire unless an arrow is loaded. A premium, clean-breaking trigger delivers precise, consistent accuracy. R.E.D.S. Suppressors substantially reduce shock, vibration, and noise. Limited lifetime warranty.