The Model 4510 and 4550 frangible Impact+ munitions are spin-stabilised projectile and deliver multi-effects of blunt trauma and dispersal of inert or marking powder on and around target. Although it is extremely accurate and consistent, accuracy is dependent on the launcher, using open sights vs. an improved sight, environmental conditions, and the operator. Effectiveness depends on many variable, such as distance, clothing, stature, and the point where the projectile impacts.