TM 18C Gunsmodify SAI Slide Gunsmodify Outer Barrel UAC blow back housing Guarded nozzle and nozzle valve set PDI 6.01 inner barrel UAC ghost ring rear sight Speed tuneable Glock trigger AIP 120 nozzle spring Guarder enchanted recoil spring Guarder enchanted hammer spring Gunsmodify selector switch nub Nine Ball bucking 4x Hpa tapped mags