RedWolf Airsoft has taken pains to put a fully installed one in case you don't want to do the modding yourself... "The Tokyo Marui M1A1 Thompson submachine gun combined with the ASC M41A KIT gives for one of the most eye catching AEGs available. The Redwolf engineers have worked out how to subject this gun with a weathering process which endows this sci-fi gun with an all too realistic down-to-earth used look giving this gun a gritty edge.