Airsoft Guns Buyers Guide
Airsoft GI small logo
Customer Service: 1.909.869.0671

Airsoft Gun Internal Upgrade Parts

Gearbox, Hop Up Units, Inner Barrels, ETC!

Airsoft GI has worked with enough airsoft guns to know that what’s inside really counts. If your airsoft gun has a broken mechanism or has simply fallen behind the times, our internal upgrade parts will have you back in the game. We have airsoft gun internal parts for AEGs, spring sniper rifles and gas blowback pistols and rifles. Add aftermarket AEG cylinder heads to maximize compression or install a precision inner barrel for better accuracy. Replace a burned-out stock motor with a standard OEM motor or upgrade to a high torque model that can handle other internal upgrades.

Our gas airsoft internal upgrades include recoil springs that increase felt recoil, loading nozzles that improve durability and high flow valves to increase FPS velocity. You can upgrade your spring rifle as well with parts that give your shots more distance and more precision. We carry parts from all the leading airsoft parts manufacturers such as Action Army, Danger Werx, G&G, Modify, SHS, and Lonex – and we make some of our own internal airsoft parts. Full tech support comes with every purchase, so you can turn to us if you encounter troubles while you work.


Refine Search

158 items | Pg «   7 
| Sort
| Display
Automatic Free Shipping On All Orders Over $179! Coupon code "2025" for 10% off!
Lancer Tactical M120 AEG Spring by SHS

Lancer Tactical M120 AEG Spring by SHS

  • Set Desired FPS
  • Durable Tension
  • High Strength Design

$8.50

BUY NOW

Lancer Tactical M110 AEG Spring by SHS

Lancer Tactical M110 AEG Spring by SHS

  • Set Desired FPS
  • Durable Tension
  • High Strength Design

$8.00

BUY NOW

Lancer Tactical M100 AEG Spring by SHS

Lancer Tactical M100 AEG Spring by SHS

  • Set Desired FPS
  • Durable Tension
  • High Strength Design

$8.00

BUY NOW

Lancer Tactical Fiber Reinforced Light Weight Metal Tooth Piston by SHS (Blue)

Lancer Tactical Fiber Reinforced Light Weight Metal Tooth Piston by SHS (Blue)

  • Nylon Fiber Construction
  • Full Metal Tooth Rack
  • Speed Rails for Proper Lubrication
  • Lightweight

$14.99

BUY NOW

Lancer Tactical Fiber Reinforced 7 Metal Tooth Piston by SHS (Blue)

Lancer Tactical Fiber Reinforced 7 Metal Tooth Piston by SHS (Blue)

  • Nylon Fiber Construction
  • Half Metal Tooth Rack
  • Speed Rails for Proper Lubrication
  • Lightweight

$12.99

BUY NOW

Lancer Tactical Well Steel Cylinder MB01 MB04 MB05 by SHS

Lancer Tactical Well Steel Cylinder MB01 MB04 MB05 by SHS

  • Steel Construction
  • Increased Muzzle Velocity
  • Output Consistency

$40.00

BUY NOW

Lancer Tactical AEG Tappet Plate Ver. 2 by SHS (Blue)

Lancer Tactical AEG Tappet Plate Ver. 2 by SHS (Blue)

  • Polycarbonate Construction
  • Increased Durability
  • Lightweight

$5.99

BUY NOW

Lancer Tactical 100:200 Super High Torque Gear Set  OEM By SHS

Lancer Tactical 100:200 Super High Torque Gear Set OEM By SHS

  • Ratio: 100:200
  • Steel Construction
  • Heat Treated
  • Includes: Bevel, Spur, Sector

$34.00

BUY NOW

Lancer Tactical Fiber Reinforced Full Metal Tooth Piston Blue by SHS (Blue)

Lancer Tactical Fiber Reinforced Full Metal Tooth Piston Blue by SHS (Blue)

  • Nylon Fiber Construction
  • Full Metal Tooth Rack
  • Speed Rails for Proper Lubrication
  • Lightweight

$14.99

BUY NOW

Lancer Tactical 100:300 Ultra High Torque Gear Set by SHS

Lancer Tactical 100:300 Ultra High Torque Gear Set by SHS

  • Ratio: 100:300
  • Steel Construction
  • Heat Treated
  • Includes: Bevel, Spur, Sector

$34.00

BUY NOW

Lancer Tactical 16:1 High Speed Gear Set by SHS

Lancer Tactical 16:1 High Speed Gear Set by SHS

  • Ratio: 16:1
  • Steel Construction
  • Heat Treated
  • Includes: Bevel, Spur, Sector

$34.00

BUY NOW

Lancer Tactical 18:1 Standard Gear Set by SHS

Lancer Tactical 18:1 Standard Gear Set by SHS

  • Ratio: 18:1
  • Steel Construction
  • Heat Treated
  • Includes: Bevel, Spur, Sector

$34.00

BUY NOW

$5.99

BUY NOW

Previous Page
Copyright © 2025 Airsoft GI
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.

By accessing the Site, you certify that you are older than 18 years of age or the age of majority where you live, whichever is older; that you are the owner of any credit card used to purchase on items on the Site; that you are familiar with all local laws in your area affecting your legal right to access airsoft products; that any products you buy are for your own private enjoyment and that you will NEVER share these products with a minor in ANY WAY.