This is an injection-plastic aircraft model kit.
From the Hasegawa website:
Designed by Alexander Martin Lippisch in the early 1940s, the ME-163 Komet remains the only rocket-powered aircraft to ever become fully operational. During a 1944 flight, test pilot Rudy Opitz reached an astonishing 698 mph. However, the aircraft's brief seven-and-a-half minute flight times made it an ineffective fighter. An estimated 370 Komets were produced before WWII's end in 1945. This limited edition kit features new resin parts plus two sets of decals.
Parts come molded in gray. Includes clear parts, resin parts, and decals.