*All Gotcha guns come with a black hop up pre-installed inside, and include two EXTRA (blue and red) hop ups in the box. The hop ups put a back spin on the ball allowing it to shoot further. The larger the ball, the smaller the hop up is recommended. – Black Hop Up (least backspin) - Recommended for Reballs – Red Hop Up (medium backspin) - Recommended for Valken Fate paintballs – Blue Hop Up (most backspin)