Killer Instinct Crossbow Bolts & Arrows (HYPR 20")

Killer Instinct's factory bolts are the HYPR series — typically 20-inch carbon crossbolts designed to match the FPS ratings on the bow's Lumix scope. Two things to know:

• HYPR — the standard-weight crossbolt built for a balance of speed and downrange energy.
• HYPR Lite — a lighter option that squeezes out extra FPS, useful when you want to hit the bow's advertised top speed.

Bolts ship with field points and a specific nock type (commonly a half-moon or flat nock depending on the platform). The nock has to match your string and rail — using the wrong nock is a common cause of poor string contact. Browse options on our bolts and arrows and accessories pages.

Nearly all current Killer Instinct crossbows shoot 20-inch bolts, so length is consistent across the lineup — from the Lethal 405 and Boss 405 up to the Logix 435 and Vital-X 430. What varies:

• Nock type — confirm your model uses the same nock (half-moon vs flat) as the replacement bolts. The wrong nock risks poor string engagement.
• Recommended total weight — the FPS ratings and scope calibration assume a specific bolt-plus-point weight. Faster bows like the Rapid 420 or Fuel 415 are rated with a particular arrow weight.

When in doubt, buy the HYPR bolt spec'd for your model, or verify length, weight, and nock against your owner's manual. Accessories differ by model — never assume.

Bolt weight is a tradeoff:

• Lighter bolts (HYPR Lite): more speed and a flatter trajectory, but less kinetic energy and more sensitivity to noise/vibration. Good for target work and open-country shots.
• Heavier bolts (standard HYPR or added insert/point weight): more downrange energy and penetration, quieter shot, better for larger game. Trajectory drops a bit faster.

Two rules that protect you: never shoot underweight bolts (it acts like a partial dry fire and can damage limbs), and keep total arrow weight consistent so your calibrated reticle stays accurate. Match broadhead weight to your field-point weight, then confirm zero before hunting.

Carbon bolts fail suddenly when damaged, so inspect before every session:

• Flex each shaft and listen/feel for cracks or splinters. Discard any bolt that creaks or shows fractures.
• Check that nocks are seated fully and not cracked; a loose or split nock is a leading cause of misfires.
• Inspect vanes for tears and re-glue or replace as needed.
• Tighten field points/inserts — a spinning point walks your groups.
• Retire bolts that have taken a hard impact even if they look okay.

Consistent bolts pair with a good string and a tuned scope to hold tight groups. Keep spare nocks and field points in your parts kit.

Round out your setup with:

• Lumix scopes — calibrated to the FPS your chosen bolt weight produces.
• DSC Dead Silent Crank — consistent draw for repeatable bolt speed.
• Cases — protect fletched bolts and points in transport.

Not sure which bow shoots best with HYPR bolts? See our best Killer Instinct crossbow picks and full reviews.