first it was on hold then in the closet and now it's in the 9/7 update description in the game you can go in the LA tool slot, but can't equip it or see it oLight Assault§ROOFTOP SKIRMISHER·Primary: Default Carbine·Suit: Advanced Shield Capacitor·Tool: Rocklet Rifle·Ability: Skirmisher Jump Jets·Utility: Auxiliary Shield§CLOSE-RANGE AMBUSHER·Primary: Default Shotgun·Suit: Ammunition Belt·Tool: Rocklet Rifle·Ability: Skirmisher Jump Jets·Utility: Auxiliary Shield
Wrel did post about it several times on reddit but its shelved for now. The weapon isn't what they want it to be and I'm guessing it'll be a good long while before it is (if ever). It's inclusion in the notes was indeed a typo, as stated above.