Killer Instinct Fierce 405 Review: The Easiest First Crossbow to Own

The Fierce 405 is Killer Instinct's answer to the beginner who wants full big-game capability without a steep learning curve. It ships as a ready-to-hunt package with a bore-sighted Lumix scope, quiver, rope cocker, and HYPR crossbolts, and the enclosed Accutac barrel does a lot of the accuracy work for you by keeping every bolt captive and consistent. At 405 FPS it's genuinely deer- and hog-capable, so it's not a starter toy you'll replace immediately.

It shares core technology with the Lethal 405 and Boss 405; the Fierce's identity is its beginner-focused packaging and easy handling. New shooters should also read our best Killer Instinct crossbow guide to confirm the fit.

• Beginner-friendly kit: everything needed to hunt except broadheads comes in the box, pre-tuned and mounted.
• Accutac Barrel System: the enclosed 360° barrel forgives minor form errors and produces consistent groups faster for new shooters.
• Zero-creep trigger: an approachable, clean break that helps beginners shoot to the bow's potential.
• Included rope cocker: reduces draw weight for hand cocking; upgradeable to the DSC crank later.
• Lumix scope: illuminated multi-line reticle takes the guesswork out of holdover at common hunting ranges.

Pros:

• Very easy to set up and shoot accurately from day one
• Full 405 FPS big-game capability, not a beginner compromise
• Complete kit with scope, quiver, cocker, and bolts
• Forgiving enclosed Accutac barrel
• Clear upgrade path (crank, better strings) as skills grow

Cons:

• Hand cocking with the rope cocker still takes noticeable effort; many buyers add the crank
• Not the quietest bow stock, so string dampeners help
• Full-size footprint is less handy in very tight blinds
• Stock strings need regular waxing and eventual replacement

The Fierce 405 is the pick for a genuine first-time crossbow buyer, a hunter mentoring a new shooter, or anyone who wants a fuss-free, ready-to-hunt rig with real big-game speed. If you've owned crossbows before and want a more compact or higher-end platform, look at the Fatal-X or Tempr-X. But for pure ease of ownership at a fair price, the Fierce is hard to beat.

Grow into the Fierce 405 over time: the first upgrade most buyers make is the DSC Dead Silent Crank to make cocking quiet and easy. Keep spare strings and wax on hand for maintenance, and buy extra HYPR crossbolts and field points for plenty of practice, which matters most for beginners. A case protects your investment between hunts, and you can later step up the optics. Compare beginner options on our reviews hub.