Modification Upgrade Spring for Nerf Zombie Strike Doublestrike Blaster Toy

FEATURE 1.Compatible with Nerf Zombie Strike Doublestrike Blaster  2.100% New and high quality. 3.It can promote shooting range and dart speed. 4.This spring is only for Nerf 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 Nerf Toys,Not for other product.and the product included small parts,Please be careful installing the parts to avoid damage to your Blaster!