Planet Eclipse has made a limited run of Shaft 3 barrel backs exclusively for Violent Series.This Shaft 3 barrel back is only avaliable in Black.The Shaft 3 barrel back fits the stock barrel tip for the following Planet Eclipse markers. - Etek 2 - Etek 3 - Ego 7 - Ego 8 - Ego 9 - Ego 10 - Geo 1 It also fits the Planet Eclipse SL and SL2 Barrel kits.