Crossbow Authority

Crossbow glossary

What Is Rail?

Rail: The channel or track along the top of the stock that guides the bolt and string.

By Marisol Vega, Senior Outdoor Equipment Writer & Research Editor. Manufacturer figures vary; check your crossbow's manual.

The rail, also called the flight track, supports the bolt and guides the string as it travels forward. A clean, lightly lubricated rail reduces friction and wear on the string.

Rail lubricant and string wax are standard maintenance items. Keep fingers well below the rail when shooting; the string travels along it at high speed.

Why Rail matters

The rail is where the string and bolt travel every time you shoot, so its condition affects both speed and string life. A dry or dirty rail creates friction that can lower speed and wear the string faster.

Rails also matter for safety. Because the string moves at high speed along the rail, the placement of your hand and fingers relative to it is one of the most important habits a new shooter can learn.

How to read it on a spec sheet

  • Some manufacturers call it the flight track or barrel. Names vary, but the function is the same.
  • Check whether the rail uses a specific lubricant. Follow the manufacturer’s instructions rather than using whatever is at hand.
  • Look for finger guards or design features intended to keep hands clear.

Common mistakes

  • Over-lubricating. Excess rail lube can attract dirt; apply the small amount your manual specifies.
  • Letting fingers or thumbs drift above the rail while shooting. Keep them below it, gripping the stock as instructed.

Frequently asked questions

How often should I lubricate the rail?

Follow your manual. Many manufacturers suggest lubricating at regular intervals and after wet or dusty conditions. Our maintenance guide covers a general routine.

What is a flight track?

It is another name for the rail on some designs: the channel that supports the bolt and guides the string.

Can a damaged rail affect accuracy?

It can, if it alters how the bolt sits or how the string tracks. Have any visible damage inspected by a qualified technician.

See it in our reviews

Read more in our guides

Related terms

Definitions are general information. Always follow your crossbow manufacturer's manual, and verify local laws with the relevant authority.