The October Mountain Crossbow String, 35.875 inches, is a purpose-built replacement for Killer Instinct Rival 410 and Rapid 420 crossbows. With a Velocity Plus style and a classic brown finish, it’s designed to restore reliable draw and consistent performance.

• Length: 35.875 inches
• Compatibility: Killer Instinct Rival 410 and Rapid 420 crossbows
• Style: Velocity Plus
• Color: Brown
• Available sizes: 31.25", 32", 33", 35.875", 15.375"

Replacing a worn or stretched string helps maintain proper draw weight and string alignment, which supports consistent accuracy and reliable performance. The brown finish blends with common camouflage setups, making maintenance discreet in the field. This string is an ideal upgrade for seasonal maintenance, field repairs, or upgrading to the Velocity Plus design for more dependable shots on hunts and practice sessions.