Spare parts for GHK 553 GBBR －Standard nozzle, plastic made.－Muzzle velocity：About 120m/s (vary depending on enviromental temperature) This data is by using 12kg gas, not for co2 power...
Spare parts for GHK 553 GBBR －Rubber made, nozzle buffer o-ring (black color)－O-ring size (I.D.x W)：12x3 mm－This item is the same as the part #M4-15-3, #AUG-15-3...
Spare parts for GHK 553 GBBR －Rubber made, airtight o-ring (grey color)－O-ring size (I.D.x W)：15.8x2.4 mm－This item is the same as the part #GKM-08-4, #AUG-15-4..
