Unicorn Airsoft 300mm Nitroflon Coating 6.03mm Ultimate Precision Barrel For GBB

300mm UNICORN Nitroflon Coating 6.03MM Ultimate Precision Inner Barrel For GBB
Fits for 11"~11.5" (Approx.) BBL GBB Carbine style.
1. Material: Brass with Nitroflon Coating
2. GBB specification

From March 2026, All Unicorn inner barrels will NOT include hop-up bucking. 

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.