【CUSTOM GBB WORKSHOP】 COLT M16A2 model 733 commando WE base deep marking, deep 0.3mm M16A2 type grip M16A2 type lower M16A2 type delta handguard slip ring M16A2 type forward assist early type M16A2 type steel flash hider 3rd Generation stock buffer tube 2 position aluminum 11.5" Pencil out barrel cerakote Anodizing detail fix