【CUSTOM GBB WORKSHOP】
COLT model 635 SMG 9 mm
WE base
deep marking, deep 0.3 mm
custom steel 10.5" pencil out barrel
custom no gas tube front sight
custom 9mm rear sight
buffer tube 2 position
custom no gas tube 9mm Ejection Port Cover
no forward assist upper
no forward assist bolr carrier
steel birdcage flash hiders
3rd Generation stock
detail fix
