This listing is for the Prodigy 4.25 Mk2 Thumb Ledge lower only, it is intended for Mk1 customers who already have an upper and want to upgrade to the thumb ledge option without buying a complete set.
Our ambi thumb ledge lower has horizontal serrations that match the horizontal serrations on the slide release and thumb safety which creates a cohesive aesthetic. This lower requires one of our Mk2 sized holsters. We designed our thumb ledge lower around the X300, other brands of lights have longer mounts and will sit farther forward.
