The Nova "Bloomstick" for the Remington 870 (Reinfield 880) and Dual Berettas "Panther" for the Single and Akimbo Beretta (Bernetti/Akimbo Bernetti.)

Reference points:

Berettas: http://csgostash.com/skin/253/Dual-Berettas-Panther

Nova: http://csgostash.com/skin/469/Nova-Bloomstick