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Airsoft AEG Gearbox and Accessories
In this category, you will find complete gearboxes from top manufacturers with high quality performance parts. Complete gearboxes are an easy way to upgrade your airsoft guns performance. Reinforced gearboxes are important if you plan on upgrading your gun to have a higher velocity since an upgraded spring usually puts more strain on your stock gearbox and stock gearboxes tend to warp and crack when a high tension spring is installed.

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 Displaying 1 to 37 (of 37 products) Per page count: 25 50 100 200  Result Pages:  1  

Classic Army Spring Set for Gear Box
Manufacturer: Classic Army

Airsoft AEG Gearbox and Accessories
$6.00 
$4.20
Save $1.80
Buy 1 'Classic Army Spring Set for Gear Box' Now

Classic Army Ver 2 Metal Bearing 9mm Gear Box for M4
Manufacturer: Classic Army

Airsoft AEG Gearbox and Accessories
$49.00 
$36.75
Save $12.25
Buy 1 'Classic Army Ver 2 Metal Bearing 9mm Gear Box for M4' Now

CYMA Complete MP5 Version 2 AEG Gearbox
Manufacturer: CYMA

Airsoft AEG Gearbox and Accessories
  • OEM Replacement
  • Direct Drop-In Assembly
  • Design for CYMA M5
$50.00 
$41.50
Save $8.50
Buy 1 'CYMA Complete MP5 Version 2 AEG Gearbox' Now

Lonex 8mm Enhanced Bearing AEG Gearbox Ver.2 for M16 Series
Manufacturer: Lonex

Airsoft AEG Gearbox and Accessories
  • OEM Replacement / Upgrade
  • Reinforced Construction
  • 8mm Bearings / Bushings Compatible
  • Designed for Tuned / Performance Setups
  • Includes: Gearbox Shell, Bearings, Tappet & Selector Plate
$46.99 
$39.00
Save $7.99
Buy 1 'Lonex 8mm Enhanced Bearing AEG Gearbox Ver.2 for M16 Series ' Now

Lonex 8mm Enhanced Bearing AEG Gearbox Ver.3
Manufacturer: Lonex

Airsoft AEG Gearbox and Accessories
  • OEM Replacement / Upgrade
  • Reinforced Construction
  • 8mm Bearings / Bushings Compatible
  • Designed for Tuned / Performance Setups
  • Includes: Gearbox Shell, Bearings, Tappet Plate
$55.99 
$46.47
Save $9.52
Buy 1 'Lonex 8mm Enhanced Bearing AEG Gearbox Ver.3 ' Now

Lonex AEG Gearbox Screw Set Ver. 3
Manufacturer: Lonex

Airsoft AEG Gearbox and Accessories
  • Upgrade / OEM Replacement
  • Serrated Lock Washers
  • Stabilized Gearbox
  • Includes: Four (4) Gear Box Screws and Washers
$2.99
Buy 1 'Lonex AEG Gearbox Screw Set Ver. 3 ' Now

PolarStar Fusion Engine AK Drop-in Gear Box
Manufacturer: PolarStar

Airsoft AEG Gearbox and Accessories
  • Drop-In Assembly
  • Adjustable Velocity Output
  • Adjustable Rate of Fire Output
  • Includes: One (1) Drop-In Kit / FCU
$470.00 
$423.00
Save $47.00
Out of Stock

PolarStar Fusion Engine M240B Drop-in Gear Box
Manufacturer: PolarStar

Airsoft AEG Gearbox and Accessories
  • Drop-In Assembly
  • Adjustable Velocity Output
  • Adjustable Rate of Fire Output
  • Includes: One (1) Drop-In Kit / FCU
$500.00 
$450.00
Save $50.00
Buy 1 'PolarStar Fusion Engine M240B Drop-in Gear Box   ' Now

CYMA M14 AEG Gearbox (Black)

(1 review)

CYMA M14 AEG Gearbox (Black)
Manufacturer: CYMA

Airsoft AEG Gearbox and Accessories
  • OEM Replacement
  • Direct Drop-In Assembly
  • Design for CYMA M14
  • Includes: One (1) Complete Gearbox
$56.45 
$46.85
Save $9.60
Out of Stock

D Boy M4 AEG Gearbox w/ Metal Bushings (Black)

(1 review)

D Boy M4 AEG Gearbox w/ Metal Bushings (Black)
Manufacturer: D Boy

Airsoft AEG Gearbox and Accessories
  • OEM Replacement
  • Direct Drop-In Assembly
  • Design for D Boy M4
  • Includes: One (1) Complete Gearbox
$56.10 
$46.56
Save $9.54
Out of Stock

Echo 1 Complete 6mm Gear Box for Mk5

(1 review)

Echo 1 Complete 6mm Gear Box for Mk5
Manufacturer: ECHO 1

Airsoft AEG Gearbox and Accessories
  • OEM Replacement
  • Direct Drop-In Assembly
  • Design for Echo 1 MK5
$39.99
Out of Stock

Echo 1 Spring Set for AEGs
Manufacturer: ECHO 1

Airsoft AEG Gearbox and Accessories
  • OEM Replacement
  • Metal Construction
  • Complete Gearbox Spring Set
  • Includes: One (1) Spring Set
$6.00 
$5.40
Save $0.60
Out of Stock

JG Complete AK-47 Upgraded/Reinforced AEG Gearbox
Manufacturer: JG

Airsoft AEG Gearbox and Accessories
  • OEM Replacement
  • Drop-In Gearbox for JG AK Series
  • Upgraded Reinforcement
  • Includes: One (1) Complete Gearbox
$59.98 
$49.78
Save $10.20
Out of Stock

JG Complete Gearbox for MK5 Series
Manufacturer: JG

Airsoft AEG Gearbox and Accessories
  • OEM Replacement
  • Drop-In Gearbox for JG MK5 Series
  • Upgraded Reinforcement
  • Includes: One (1) Complete Gearbox
$40.00 
$33.20
Save $6.80
Out of Stock

JG Complete MK5 Upgraded/Reinforced AEG Gearbox
Manufacturer: JG

Airsoft AEG Gearbox and Accessories
  • OEM Replacement
  • Drop-In Gearbox for JG MK5 Series
  • Upgraded Reinforcement
  • Includes: One (1) Complete Gearbox
$59.98 
$49.78
Save $10.20
Out of Stock

JG M16 M130 Complete AEG Gearbox (Rear Wired)

(1 review)

JG M16 M130 Complete AEG Gearbox (Rear Wired)
Manufacturer: JG

Airsoft AEG Gearbox and Accessories
  • OEM Replacement
  • Drop-In Gearbox for M4 / M16
  • Rear Wired
  • Includes: One (1) Complete Gearbox
$65.00 
$53.95
Save $11.05
Out of Stock

JG M4 M130 Complete (Front Wired) AEG Gearbox w/ MOSFET

(4 reviews)

JG M4 M130 Complete (Front Wired) AEG Gearbox w/ MOSFET
Manufacturer: JG

Airsoft AEG Gearbox and Accessories
  • OEM Replacement
  • Drop-In Gearbox for M4 / M16
  • Front Wired / Built In MOSFET
  • Includes: One (1) Complete Gearbox
$90.00
Out of Stock

JG M4 M130 Complete AEG Gearbox (Front Wired)

(6 reviews)

JG M4 M130 Complete AEG Gearbox (Front Wired)
Manufacturer: JG

Airsoft AEG Gearbox and Accessories
  • OEM Replacement
  • Drop-In Gearbox for M4 / M16
  • Front Wired
  • Includes: One (1) Complete Gearbox
$65.00 
$53.95
Save $11.05
Out of Stock

JG MK36C Complete AEG Gearbox (No Motor)

(2 reviews)

JG MK36C Complete AEG Gearbox (No Motor)
Manufacturer: JG

Airsoft AEG Gearbox and Accessories
  • OEM Replacement
  • Drop-In Gearbox for Echo 1 / JG MK36
  • Includes: One (1) Complete Gearbox
$40.00 
$33.20
Save $6.80
Out of Stock

Lancer Tactical Ver. 2 8mm QD Gearbox Shell w/ Bearings (Red)
Manufacturer: Lancer Tactical

Airsoft AEG Gearbox and Accessories
  • Easy Release Spring Function
  • Reinforced Design
  • 8mm Bushing / Bearing Compatible
  • Includes: One (1) Gearbox Shell
$99.99 
$82.99
Save $17.00
Out of Stock

Lonex AEG Gearbox Spring Set for Ver. 2 & 3
Manufacturer: Lonex

Airsoft AEG Gearbox and Accessories
  • Upgrade / OEM Replacement
  • Metal Construction
  • Includes: Seven (7) Screws
$2.99 
$2.48
Save $0.51
Out of Stock

Lonex M16-A2 Rear-Wired SP120 Complete AEG Gearbox (Original Type)

(2 reviews)

Lonex M16-A2 Rear-Wired SP120 Complete AEG Gearbox (Original Type)
Manufacturer: Lonex

Airsoft AEG Gearbox and Accessories
  • OEM Replacement / Upgrade
  • Reinforced Construction
  • 8mm Bearings / Bushings Compatible
  • Drop In Assembly
  • Includes: One (1) Complete Gearbox
$174.99
Out of Stock

Lonex M4-A1 Front-Wired SP120 Complete AEG Gearbox (Original Type)
Manufacturer: Lonex

Airsoft AEG Gearbox and Accessories
  • OEM Replacement / Upgrade
  • Reinforced Construction
  • 8mm Bearings / Bushings Compatible
  • Drop In Assembly
  • Includes: One (1) Complete Gearbox
$174.99
Out of Stock

Lonex SR-16 Complete SP120 AEG Gearbox (Original Type)

(1 review)

Lonex SR-16 Complete SP120 AEG Gearbox (Original Type)
Manufacturer: Lonex

Airsoft AEG Gearbox and Accessories
  • OEM Replacement / Upgrade
  • Reinforced Construction
  • 8mm Bearings / Bushings Compatible
  • Drop In Assembly
  • Includes: One (1) Complete Gearbox
$172.99
Out of Stock

Modify Spring Set for Ver.2/Ver.3 Gearbox
Manufacturer: Modify

Airsoft AEG Gearbox and Accessories
  • Metal Construction
  • Designed for a Ver. 2 or Ver. 3 Gearbox
  • 45 Day Warranty
$7.00 
$6.30
Save $0.70
Out of Stock

PolarStar Fusion Engine Gen. 3 M4 AEG Drop-In Gear Box

(3 reviews)

PolarStar Fusion Engine Gen. 3 M4 AEG Drop-In Gear Box
Manufacturer: PolarStar

Airsoft AEG Gearbox and Accessories
  • Drop-In Assembly
  • Adjustable Velocity Output
  • Adjustable Rate of Fire Output
  • Includes: One (1) Drop-In Kit / FCU
$470.00
Available on AirsoftGI.com
Out of Stock

PolarStar Fusion Engine M249 Drop-in Gear Box
Manufacturer: PolarStar

Airsoft AEG Gearbox and Accessories
  • Drop-In Assembly
  • Adjustable Velocity Output
  • Adjustable Rate of Fire Output
  • Includes: One (1) Drop-In Kit / FCU
$500.00
Out of Stock

PolarStar Fusion Engine Patriot Edition Gen. 3 M4 AEG Drop-In Gear Box
Manufacturer: PolarStar

Airsoft AEG Gearbox and Accessories
  • Drop-In Assembly
  • Adjustable Velocity Output
  • Adjustable Rate of Fire Output
  • Includes: One (1) Drop-In Kit / FCU
$470.00
Out of Stock

SHS AEG Spring Kit for Version 3
Manufacturer: SHS

Airsoft AEG Gearbox and Accessories
  • Metal Construction
  • OEM Replacment
  • Fits Ver. 3 Gear Boxes
  • 45-Day Warranty
$3.00 
$2.70
Save $0.30
Out of Stock

SHS Version 2 AEG Spring Kit
Manufacturer: SHS

Airsoft AEG Gearbox and Accessories
  • Replacement parts for V2 gearbox.
  • 45-Day Warranty
$3.00 
$2.70
Save $0.30
Out of Stock

SHS Version 7 AEG Spring Kit
Manufacturer: SHS

Airsoft AEG Gearbox and Accessories
  • Metal Construction
  • OEM Replacment
  • Fits Ver. 7 Gear Boxes
  • 45-Day Warranty
$3.00 
$2.70
Save $0.30
Out of Stock

Systema AEG Spring Set (Black/Silver)

(0 review)

Systema AEG Spring Set (Black/Silver)
Manufacturer: Systema

Airsoft AEG Gearbox and Accessories
  • OEM Replacement
  • Metal Construction
  • Complete Gearbox Spring Set
  • Includes: One (1) Spring Set
$6.00 
$5.40
Save $0.60
Available on AirsoftGI.com
Out of Stock

Systema Complete High Speed 1 Joule M16 AEG Gearbox
Manufacturer: Systema

Airsoft AEG Gearbox and Accessories
  • Performance Upgrade
  • Drop-In Kit
  • Increased Reliability / Performance
  • Includes: One (1) Complete Gearbox
$240.00
Out of Stock

Systema Complete High Speed 1 Joule M4 AEG Gearbox
Manufacturer: Systema

Airsoft AEG Gearbox and Accessories
  • Performance Upgrade
  • Drop-In Kit
  • Increased Reliability / Performance
  • Includes: One (1) Complete Gearbox
$240.00
Out of Stock

Systema Complete M150 M16 AEG Gearbox
Manufacturer: Systema

Airsoft AEG Gearbox and Accessories
  • Performance Upgrade
  • Drop-In Kit
  • Increased Reliability / Performance
  • Includes: One (1) Complete Gearbox
$260.00
Out of Stock

Systema Energy Complete M150 M16-A1/VN AEG Gearbox
Manufacturer: Systema

Airsoft AEG Gearbox and Accessories
  • Performance Upgrade
  • Drop-In Kit
  • Increased Reliability / Performance
  • Includes: One (1) Complete Gearbox
$299.95
Out of Stock

Valken V12 Engine Drop-In HPA M4 AEG Gear Box

(1 review)

Valken V12 Engine Drop-In HPA M4 AEG Gear Box
Manufacturer: Valken

Airsoft AEG Gearbox and Accessories
  • Drop-In Assembly
  • Adjustable Velocity Output
  • Adjustable Rate of Fire Output
  • Includes: One (1) Drop-In Kit / FCU
$249.95
Out of Stock
 Displaying 1 to 37 (of 37 products) Per page count: 25 50 100 200  Result Pages:  1  
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Disclaimer: All airsoft guns are required to have the tip (1/4 inch) of the barrel permanently colored in blaze orange. No person may openly display or expose any imitation firearm (replica firearm), in a public place. The term "public place" means an area open to the public or exposed to public view and includes streets, sidewalks, bridges, alleys, plazas, parks, driveways, parking lots, automobiles, whether moving or not, and buildings open to the general public, including those that serve food or drink, or provide entertainment, and the doorways and entrances to buildings or dwellings and the grounds enclosing them.
Any person who changes, alters, removes, or obliterates any coloration or markings that are required for by any applicable state or federal law or regulation, for any imitation firearm (replica firearm), or device in any way that makes the imitation firearm (replica firearm) or device look more like a firearm is guilty of violating the state or federal law.
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