I created these custom MA5K carbine variants years ago but hadn't published them in the MCX Gallery. The stubby spec-ops carbine variation of the MA5 assault rifle is mentioned in Halo novels a few times but as far as I know, only ever seen on the cover art illustration for Ghosts of Onyx. As per the pics, I created a standard flashlight equipped version, true to the cover art but also an under-slung grenade launcher and suppressed variations.