In May 2014, the Army selected a pattern similar to MultiCam called Scorpion W2 to replace UCP, naming it the Operational Camouflage Pattern (OCP). The original Scorpion pattern was jointly developed by Crye Precision and the Army for the Objective Force Warrior program in 2002, and Crye made small adjustments for trademark purposes to create MultiCam. Because Scorpion is similar to MultiCam, the same color Velcro, buttons, and zippers can be reused. OCP resembles MultiCam with muted greens, light beige, and dark brown colors, but uses fewer beige and brown patches and no vertical twig and branch elements. On 31 July 2014, the Army formally announced that OCP would begin being issued in uniforms in summer 2015. Soldiers are allowed to wear uniforms and field equipment patterned in MultiCam until they can acquire OCP, which is allowed until MultiCam uniforms' wear-out date projected on 1 October 2018. Beginning October 1, 2018, USAF personnel will begin transition from ABU's to OCP until 2021.