Raven Concealment Systems RCS Phantom Light Compatible Surefire X300 Ultra Series A Full Shield OWB Holster Full body shield, OWB(outside waistband band) 1.5" belt loops, Standard cant(10 degree). Fits Glock Gen 1-4 17 19 22 23 31 32 with Surefire X300 ULTRA Series A light attached. Will ONLY work with the X300 ULTRA Series A(X300U-A) You MUST have the Surefire X300 ULTRA Series A light attached to your gun in order to use this holster. It will NOT work with the X300 or X300 Ultra Series B(X300U-B).