Contact Us (626) 286-0360 Store Locations
Extended Phone Support Hours 7am-7pm PST
Browse by Type or Category
Airsoft Season! SAVE 18% with coupon code: SUMMER2018 (Exclude MAP and SALE Items)

KWA Complete Ver.2 Gearbox for M4 / M16 Series Airsoft AEG Rifles

ID: 47180 (GB-KWA-M4)
4.5 stars, based on 2 reviews
KWA Complete Ver.2 Gearbox for M4 / M16 Series Airsoft AEG Rifles
Hover or touch above to zoom


MAP ProtectedExempt From Coupons
The manufacturer of this product enforces a strict minimum advertised price (MAP) policy which excludes this product from any additional discount coupon codes. This item, however, may qualify for free shipping.

No Payments + No Interest if paid in full in 6 months through PayPal Credit. Simply check out using PayPal and select PayPal Credit!


  • High strength metal alloy shell
  • Steel 8mm bearings & reinforced steel gear set
  • High strength polymer piston, air nozzle, and selector plate
  • Rear wired (battery extension adapter required)
  • Full assembled, ready to go from KWA
Compatibility: For KWA M4 / M16 Series Airsoft AEG Rifles (Not intended for use with other brand M4 / M16 AEGs)
Spring Power: 300~450 FPS (depending on inner barrel length)

Manufacturer: KWA

California residents click here for Proposition 65 warning

About KWA

Established in 1988, KWA has been the leading designer and manufacturer of airsoft replica weapons for law enforcement and military training. Its reputation for quality, performance, and reliability makes KWA a recognized leader in professional airsoft products. In a time when airsoft development is focused on external replications and logos, KWA has been advancing airsoft technologies with the introduction of the NS2 Gas Blowback System and the 2GX Mechbox. Both product advancements increase the overall performance and reliability beyond all conventional standards of the industry. These products represent KWA’s commitment to excellence and passion for engineering products that simply outperform. KWA’s state-of-the-art manufacturing facility is located in Taiwan with an independent sales and distribution operation in the United States that services the Americas and all European Regions.

2 Customer Reviews

(Write a review)

by walter V. on 01/11/2016
"Just a heads up to the gun techs out there, this gearbox will not fit in a king arms upper receiver. Other than that it is a great gearbox haven't had any issues other than the wiring. Swap that out and you have a top of the line gearbox
by Jarred C. on 09/01/2015
"Amazing gearbox. Very solid and durable. I've had my KWA M4 RIS for a year now with tons of BB's put through. My only issue is the fact that I was a noob about the gun and kept the spring under tension so now it shoots 360 instead of the previous 400. It's my fault though.

If you have a compatible gun, this gearbox is amazing. I would totally reccomend. The whole design is slightly proprietary but still not a big deal because upgrading really isn't needed.

Questions, Answers and Comments

Discuss about KWA Complete Ver.2 Gearbox for M4 / M16 Series Airsoft AEG Rifles with your friends and fellow shoppers!

Comment or answer questions for a chance to win awesome prizes. Details can be found on the Facebook page. Remember to check "Also post on Facebook" to qualify for the giveaways!

Have an urgent question about this item? We monitor these comments daily, but it may be faster to email us directly or call us at (626) 286-0360. Our resident experts are standing by to answer your questions!