This listing is for a new Worker 6Kg uprated main spring for the Nerf Strongarm, Disruptor & Flipfury blasters. This is a fairly easy upgrade that will give you faster dart speeds and greater range - all you need is a precision screwdriver and, if necessary, a few minutes to search YouTube to see how to disassemble your blaster and install.

FOR AVOIDANCE OF ANY DOUBT,  BLASTER IS NOT INCLUDED!! This listing is for the upgrade spring only.

Gun cocking takes more effort so not suitable for under 14s. These really pack a punch once installed!

This is not an official Nerf product and will most likely void any warranty on your blaster. Listing is for the upgrade kit only, not the blaster.

Shipping is either by tracked courier or Royal Mail depending on size / weight.

Please take a look at my other auctions for other Nerf-related bits & pieces.

Disclaimer - when installed correctly this will noticeably increase dart speed and if not used responsibly may result in injury to yourself and others. I also suggest you check with your local police authority with regard to the legality of modified blasters - some of the higher powered ones may require a licence. Modify blasters at your own risk and always play safely! For ages 14+ only, parental supervision required and, as always, please wear safety goggles and long sleeves / trousers at all times. I will take no responsibility for any injury, damage caused or legal complications.