Blaster Mod Upgrade 6KG Spring for Nerf Zombie Strike Survival System Nailbiter Blaster

FEATURE 1.Compatible with Zombie Strike Survival System Nailbiter Blaster. 2.100% New and high quality. 3.It can promote shooting range and dart speed. 4.This spring is only for Blaster toy,All parts are separate,and the product included small parts, you need to install and assemble your blaster,Please be careful installing the parts to avoid damage to your Blaster! 5.Blaster not included! Specifications Material: Stainless Package Weight: 25g Package Size:210×100×25mm Package included 1x Spring Sets Note:  Manufacturer recommended age:14 years and up. This Product is only for blaster Toys,Not for other product.and the product included small parts,Please be careful installing the parts to avoid damage to your Blaster!