【CUSTOM GBB WORKSHOP】
COLT CAR-15 model 607 SMG early
viper base
deep marking, deep 0.3mm
18mm bolt
real M16A1 ejection port cover
real M16A1 Crush Washer
real front swivel
real charging handle
real front pivot pin
custom steel flash hider
custom handguard
custom stock
Anodizing
phosphate coating
detail fix
