Stage 1: modifications for the Sidestrike include Air Restictor removal allowing a clear path of air to the dart. Removing the air restictor allows the blaster to not only shoot farther, but also allows a better variance on what the condition of the darts are able to be in order to be fired out of the blaster.
Stage 2: modifications for the Sidestrike include stage 1 modification (removal of AR) and an upgraded spring allowing the plunger to force air quicker firing the darts faster and further.
*Hasbro has not authorized or recommended modifications to their blasters. Modifications void any manufacturer warranties associated with the product.