I think we did a bit of a write up on this thing at WaT didn't we?Something between a muffler (kind of a silencer reducing noise by between 8 and 30 db according to wavelength measured) and a ballistic test setup produced by Rheinmetall (IfL Muffler).
http://www.google.es/url?sa=t&rct=j...=cdoGjw0M2S-2nDC_-jfLeg&bvm=bv.46226182,d.ZGU
This evoluted from the IfL Muffler for the Leopard 120mm cannon:
http://www.slideshare.net/VladZinchenko/bu-hibaltimore01
Rattler
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