GuayGuay have added to the news of their UMP style stock for the MP5/G3 series, with details of their new stock designed for the GR16 models (but which will no doubt fit other M4/16 copies).
Out on November 30th the stock is a four position unit with a sling attachment at the front and comes in at 2660Yen. The stock is very similar to a product made by Ace Ltd USA called the M4 SOCOM stock.
