The human body can be a deadly weapon - I "toyed" around with an Okinawan hard style for a bit when younger - those proficient could make someone just as dead and just as fast as a .357 to the central chest. I didn't stick around long enough to become proficient/obtain a belt, but I did get some tips on ways to cause damage - I considered it to be a sophisticated form of street fighting; no holds barred and leverage any and all opportunities.
These days, if I came upon a younger me, I would have to shoot to save myself.