Upgrade your Apollo XV-700 blaster with this premium piano steel spring. This 13kg / 15kg spring will enhance the power and velocity of your nerf rival blaster, providing a competitive edge in battles. Package includes 1 spring and o-ring for easy mod installation.

Specifications:

Material: piano steel

Type: 13kg / 15kg

Package includes: 1x nerf rival apollo xv700 blaster spring upgrade mod