Upgrade your Nerf N-Series Gear Up Pack blasters with our spring parts! Made of durable piano steel, our 11.5 kg spring will greatly improve your fire range and velocity.  This upgrade pack also includes a plunger o-ring and aluminum plate. Take your gameplay to the next level with our Gear Up Pack Upgrade Spring Mod!

Specifications:

Material: piano steel.

Compatibility: nerf n-series gear up pack 3x blasters.

Spring Type: 11.5 kg.

Package includes: 1* spring upgrade part, 1 plunger o-ring, 1 aluminum plate.