Unicorn GBB 410mm 6.03mm Inner Barrel

UNICORN Nitroflon Coating 6.03MM Ultimate Precision Inner Barrel For GBB

Common size for:

for M4-16″ and fit for TYPE89 or SR-25

length: 410MM

outer: 8.55MM

inner: 6.03MM

material: Brass electroplating nitroflon coating

includes: 60 degree GBB Unicorn hop up bucking