【CUSTOM GBB WORKSHOP】
COLT XM16E1 model 603
WE GBB base
deep marking, deep 0.3mm
Steel out barrel
ra tech teel bolt
ra tech Magnetic Locking NPAS plastic loading nozzle
ra tech fire trigger box
ra tech steel select
real magazine release
real takedown pins
real ejection port cover
real forward assist
real barrel nut assembly
real crush washer
real charging handle
real rear sight
real front swivel
real trigger guard
real handguard retainer
real handguard
real grip
real stock
Anodizing
phosphate coating
detail fix
