This is my Gock 21. It's a full size .45 auto. For PD I load with either 230gr Speer Gold Dot or 230gr Hornady Critical Defense. It sleeps on my night table when at home and rides with me in the console of my F-150 on road trips. I generally carry it's little brother, my G36 (compact .45) IWB, OWB or shoulder depending upon weather and situation.