Power up your blaster with this 16.5kg upgrade spring.  Compatible with the Longshot CS-6 and the Zombiestrike Longshot CS-12. Provide serious firepower to your blaster with this upgrade spring.

This is an advanced spring.  Only purchase this spring if you are an experienced modder.  Catastrophic blaster failure (ie you will break it) will occur if your blaster is not strengthened.  Sufficient blaster reinforcement is needed with use of this spring.

This 16.5kg spring has been designed to use with reinforced, strengthened Longshots.  Get the max fps out of your blaster whist retaining a manageable priming force.  Strong Aussie made spring steel, closed and ground ends to maintain form under full compression.  To make full use and performance out of this spring you will need a sealed breech of some kind/make.  Upgraded catch spring is needed.  Please select from the pull down menu.

Expectations.  Variables considered, depends on darts used (quality/condition), Blaster condition, breech used, lubrication and how well it is been maintained, seal etc.
Stock Longshot = Don't use with stock longshot (use our 8kg longshot spring)
Sealed breech (pusher kit)= 220-230fps (better results with 350mm barrel (250fps))
Sealed breech (brass breech)= 250-260fps

Make sure you re-install the stock 'prime indication bar'.  This both serves as a stopper when priming back, and also holds the catch spring from popping out of place.

These are our own BlasterTECH springs, designed and tested in house.  They are made from high quality spring steel from our own direct spring manufacturer.  Australian made.

Note:  You will need to upgrade your Catch Spring with this 16.5kg main spring.

Blaster compatibility:  Zombiestrike Longshot CS-12 and Longshot CS-6.

Important Safety
Blasters are modified at your own risk.  BlasterTECH will not accept any liability for damage or reduction of lifespan of your blaster.  BlasterTECH will not accept any liability for injury caused during or after modification.  The items on this site are safe as long as the operator uses it safely. The items on this site are to be used by those 18years or older.  Always wear protective eye wear whilst using blasters. Never point or aim at someone's eyes or face. Always use approved darts. By purchasing these items you will use it in a safe and responsible manner and you agree that BlasterTECH will not be liable for any injury caused by misuse or accidental usage.