Tokyo Marui Saiga 12K GBB. Custom 1000 BB drum mag with 3D printed 155mm body and modified Lonex / DBOYS Flashmag mechanism. Original TM gas reservoir installed, intake valve compatible with HPA adapters, TM/Hi Capa thread. Equipped with custom handguard, Zenitco PT 1 style stock, 1PK120 optics on side rail, and PBS 1 suppressor. Fully functional, tight feed, and no leaks.