What IDPA class does my Glock belong in?
“WHAT DIVISION DOES MY GLOCK BELONG IN? A Glock that otherwise meets the criteria set forth in the equipment section of this rule book belongs in the Stock Service Pistol Division unless it has had modifications done to it other than those allowed in that division. If additional modifications have been added (examples: Robar grip reductions, add- on magazine well opening), the modified Glock must compete in either the Enhanced Service Pistol or Custom Defensive Pistol Division depending upon its caliber.” In addition, any Glock which can compete in SSP can also compete in ESP (if 9mm or .40 S&W) or CDP (if 10mm, .45 ACP, or .400 Cor-Bon, provided the ammo makes 165 Power Factor).