The ISC LE Ti-BF initials stand for "Law Enforcement Titanium Barrel Forward" suppressor.  This suppressor was specifically designed with law enforcement in mind.  The unique monocore design reduces the number of parts in the overall design, which means less issues with alignment, virtually erasing the likelihood of a baffle strike or parts coming loose.  In addition, the entire suppressor is made from Titanium, making it super strong as well as lightweight.