JM Gen8 Gearbox — Full Nylon Replacement for JinMing M4A1, SCAR, UMP45 & More
SKU: 71880328709

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

Sale price$23.36 Regular price$25.95
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Ships within 48 hours · Estimated delivery Jul 6 - Jul 11

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Description

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

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 constuction with nylon gears.

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:

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 71880328709

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barneysdoghouse
Massapequa, US
★★★★★ 5
No hassle refund
So glad I bought the plan. After 2.5 years of everyday use of my toaster, it quit working. Contacted Asurion, they emailed a shipping label. A few hours after I dropped the package off at UPS, I had the refund in my Amazon account. Very easy, no hassles.
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Reviewed in the United States on March 27, 2026
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Sam
Cuba, US
★★★★★ 1
Very bad
This guys are just an eye wash, they do not cover anything but will charge you. I bought Hand Blender and it broke in couple of months and I took 3 year protection from Asurion. When I contacted them about the issue, they said it is not started, go to manufacturer. I reached out to Amazon and they replaced it for me. Now again it broke. I reached out to asurion again. Now they say it is not contract. what is the point of having protection. Waste of time and money. I will not recommend this to anyone. This is a fraud protection.
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Reviewed in the United States on June 8, 2026
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ELIZABETH
Phoenix, US
★★★★★ 5
Extra Warranty
Having the extra warranty on my item, really paid off!
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Reviewed in the United States on May 22, 2026
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Betty
Whiting, US
★★★★★ 5
Great price & works fast.
Compact and fast - I love it! Could not beat the price and it's faster than my Food Saver!
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Reviewed in the United States on April 17, 2026
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Patty
San Leandro, US
★★★★★ 5
Protection Plan
The process was easy and flawless
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Reviewed in the United States on June 1, 2026

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