Feature：

➤ Stainless steel screw direct locking HOP-UP pressure adjustment.
➤ Reducing HOP-UP positioning loose due to shooting vibration.
➤ Inner Barrel Length : 97mm
➤ For VFC/Umarex G17 Gen5

➤ Stainless steel screw direct locking HOP-UP pressure adjustment.
➤ Reducing HOP-UP positioning loose due to shooting vibration.
➤ Inner Barrel Length : 86mm
➤ For VFC/Umarex G19X /G19 Gen4 /G45