Metal barrel
this is a 175mm barrel longer than the original gecko 148mm barrel.
material: metal.
color: bronze.
size: 17.5cm .
package: 1x inner barrel for gecko 1.0 or gecko 2.0.

Metal spring:

The spring for gecko can also fit for bj02 rhinoceros blaster.
increase power and shooting range.
material: piano wire.
type: 10kg; 11.5kg

Metal Piston package:
1x long spring
1x short spring
1x nozzle o-ring
1x piston o-ring