Recently we have been testing a new trigger strut. This simple upgrade to the CSV launchers prevents the trigger from moving on the threads. In the distant past we used to glue these threads, but that did not always work and it made service difficult. Recently we have recommended using teflon tape in the threads which works well but does not provide firm support for the trigger, so it may move. The new aluminum strut goes from the rear of the barrel to the top of the trigger and solves this problem.