Usually, we need to press the button of grenade to return to original place after shooting, and then fill gas to continue again.
Do you have the grenade launcher which do not need to press the button of the grenade to fill gas.
How should I achieve such design?
Where can I buy such grenade launcher?
I only have the ones like the follow pictures.
http://i1192.photobucket.com/albums/...raliang/12.jpg
http://i1192.photobucket.com/albums/...aliang/123.jpg