Guarder Spring Guide with Bearing for Ver. 3 Gearbox Category_Cylinder Set (Bore-Up) the airsoft AEG powerfully shooting

the airsoft AEG powerfully shooting at 280fps without any problem

- Full metal Body With Steel Top Cover

Polycarbonate Piston Head with Thrust Bearing is renewed to be more effective

Thread: 14mm Negative / 16mm Positive

achieving 290 FPS of muzzle velocity (Power)

Guarder Spring Guide with Bearing for Ver. 3 Gearbox Category_Cylinder Set (Bore-Up) the airsoft AEG powerfully shootingGUARDER Steel Spring Guide with Ball Bearing For Marui Gearbox Ver III Airsoft AEG To build a tight & durable gearbox This reinforced Spring Guide replace the original Stock Spring Guide of Airsoft AEG This spring guide with Ball Bearing is designed to minimize the load for the motor caused by the spring tension Especially important for upgraded AEG to install this It also makes spring effectively spring back Backstop is specially equipped with Ball