Found a few more pics of it on this page. You'll have to scroll down to see them.
Click Me
Dear Mr Eller
With reference to your mail of 14 February 2008
thank you for your mail regarding the shooting muffler for the PzH M109. We
can give you the information that this system was only a study by a
well-known german company. So we can not provide you a construction plan or
any details about the function. It was tested here at the test center for
weapon and ammunition a few years ago but it was not established in the
Bundeswehr. Meanwhile our prototype was scrapped. Enclosed you will find a
few pictures of the "schalldämpfer".
Linear Mode
