This is the last flip cap you will ever need! Virtually indestructible, this cap will fit snugly on nearly all Vortex Optics and features a snap flat spring that will keep your line of sight unobstructed. Fits Razor HD Gen II RZR-31802 RZR-31803 RZR-52005 RZR-52006 PST-210S1-M Viper PST PST-43127 PST-43128 PST-624F1-A PST-624F1-M PST-624S1-A PST-624S1-M PST-416F1-A PST-416S1-A Viper HST VHS-4310 VHS-4325 Viper HSLR VHS-4315-LR VHS-4307-LR Intrepid HD INT-301 Viper HS VHS-4307 VHS-4319 Viper VPR-M-06MD VPR-M-06BDC Diamondback DBK-M-03P DBK-03-BDC Crossfire CF2-31011 CF2-31027 Golden Eagle TCS-1503