Abstract: A retaining clip for the retention of a fin-stabilised projectile in a desired position in a barrel at the rear breech end of a launcher, the clip comprising a generally cylindrical body portion having: engagement means for engaging with the launcher at the said rear breech end, said engagement means extending at least part of the way around the said cylindrical body portion and adapted to prevent forward movement of the clip when positioned in the launcher, a substantially central axial aperture for allowing access for firing the projectile a plurality of radially and axially extending grooves for engaging the fins of the projectile when the clip is fitted to the projectile, each of said grooves having facing walls defining the groove therebetween, and the grooves adapted to divide the cylindrical body portion into a plurality of connected segments locating means positioned on at least one of said walls of at least one of said grooves and intruding into or above the groove, said locating means adapted to