JM Gen8 Gearbox — Full Nylon Replacement for JinMing M4A1, SCAR, UMP45 & More

This is the famous Jinming Gen 8 Gearbox, it's full nylon made, reliable and durable. This is superior to the old one with metal bushings and nylon gears. But most importantly a harden nylon shell.

Compatible with JinMing SCAR  / JM Gen8 M4a1 / HLF UMP45 / JM MP5 / JM Gen13 / XM316 / blg m16 / ZH m249 and other gel blasters using gen8 gearbox.

Features:

• Full Nylon Construction — Hardened nylon shell, gears, trigger, 
  T-piece and motor housing for superior durability over stock parts

• Upgraded Over OEM — Metal bushings replaced with reinforced nylon 
  for smoother operation and reduced wear under sustained fire.

• Powerful 460 Motor Included — No sourcing extra parts; ready to 
  install and run straight out of the box.

• Two Fire Mode Options — Choose Original (full auto) or New 
  (semi/full auto) to match your play style and blaster setup.

• Broad Gen8 Platform Compatibility — Fits JM M4A1, SCAR, UMP45, 
  MP5, Gen13, XM316, BLG M16, ZH M249 and more.

• Drop-In Replacement — Designed to fit existing Gen8 housings with 
  no modification required.

• Extend Your Blaster's Life — Rebuild instead of replace; keep your 
  favourite platform running at peak performance.

Specifications:

Brand: jin ming.

Material: nylon.

Fire mode: full automatic (old),  semi/full auto (new).

Color: black.

Motor type: 460.

Plug type: sm.

Package includes: 1x jm gen8 gearbox.

Gen8 Gearbox Disassembly Videos: