New Designz Invert Mini Bolt Spring Kit

The NDZ Invert MINI Performance Bolt Spring Kit
Each kit includes 3 different force springs, from hard to soft. All springs have LESS force than your stock bolt spring, its a tuners delight. This kit is optimized for use with our Delrin V2 bolt for reduced input pressures, dwell, reduced firing signature, improved shot consistency, reduced bolt wear while reducing mass. Check the forums, this is what people are talking about..

The NDZ Invert MINI Performance Bolt Spring Kit features:

each kit contains 3 springs, each with a different force

color coded for easy identification

lowers your input pressure and dwell when used w/ V2 bolt

improved shot consistency

lower pressure is easier on paint

Spring Chart Below
(RED = Hardest)
(Yellow = Mid)
(Blue = Weakest)

Notice- NDZ springs may not work properly with stock or some other aftermarket bolts.