Get this powerful spring upgrade mod for your NERF Strongarm Dart Blaster. With a 4.5kg or 6kg upgrade, your blaster will have increased power and performance. 

Specifications:

Material: piano steel.

Compatibility: strongarm nerf blaster.

Type: 4.5kg  / 6kg.

Color: silver.

Package includes: 1x nerf strongarm blaster spring upgrade mod .