【CUSTOM GBB WORKSHOP】
COLT M16A2 model 723 carbine II
GHK base
deep marking, deep 0.3mm
steel stock lock nut
Custom C7 upper kit 7075-t6 forged for ghk v2
Real front swivel
Real forward assist big round
Real rear sight
Real trigger guard
Real charging handle
4 position buffer tube
Anodizing
phosphate coating
detail fix
