Canna di Precisione 6.03mm Ultimate Precision Inner Barrel Set For GBB (300 mm) VFC Colt XM177E2 GBB /M4 11.5″~12″ Setup /300mm Unicorn

GBB HOP-UP SPEC.
Comes with a GBB HOP-UP Bucking (60 degree).

Corresponding reference :
For VFC Colt M733 GBB. (Slightly longer than outer barrel)
For VFC Colt XM177E2 GBB. (Slightly longer than outer barrel)
For GHK M4 GBB 12″ (Need new GHK HOP-UP set for GBB SPEC.)
For WE M4 12″ GBB Setup.
For MARUI M4A1 MWS GBB 12″ Setup.
For 11.5~12″ (Approx.) BBL GBB pistol.
Still compatible with other AIRSOFT model which with GBB HOP-UP SPEC.

● Product Brand : UNICORN AIRSOFT (Taiwan)
● Material : Copper, Rubber
● For GBB