Fits on Sonic, CTRL, Spire 5, Spire 4, Spire 3, Spire IR, Spire IR2, GFX; Constructed of durable aluminum materials; Five spring-loaded fins allow paintballs to not break while loading the loader; Strong enough to not allow the paintballs to fall out; Secure spring-loaded locking latch prevents the lid from popping open; Toolless locking clip allows the speed feed to be installed with just one click