THe extesion and outer barrels are compatible with lehui mpx gel ball blaster gun.
The extension barrel can also fit for lehui mcx.
The outer barrel needs to pair with handguard size accordingly.

Specifications:
Material: metal
Outer Barrel size: 4.5'' 6'' 8''
Extension tube size: 4cm; 8cm
Extension tube OD: 19mm
Extension tube ID: 11mm
Color: black

Package includes:
1x lehui mpx extension barrel