AirSplat Signature Bundles & Packages
Spring Airsoft Pistols
Spring Airsoft Rifles & Sniper Rifles
Gas AirSoft Pistols
Gas Airsoft Rifles & Sniper Rifles
Entry & Middle Level Airsoft Rifle AEG
Electric Airsoft Rifle AEG Guns Rifles
Airsoft Gun Magazines (Spring, Gas, AEG)
Airsoft 0.12g-0.3g 6mm BB & Targets
Airsoft Gas, CO2, Batteries, & Chargers
Grenades, Laser, Light, Scope & Mounts
Internal Upgrades Airsoft Guns
External Upgrades Airsoft Guns
Airsoft Goggle, Half Full Mask, Helmets
Apparel, BDU, Cap, Scarf, Patches
Vests, Chest Rig, Plate Carrier, Pouches
Rifle Bags, Gun Cases, BackPacks, & Bags
Paintball Guns, Barrels, & Accessory
Pre-Owned & Scrap Yard Airsoft Items Gun
Zombie & Halloween AirSoft Decorations

Newly Arrived

Socom Gear M9 Airsoft GBB Gas Gun Black

$154.99 ADD TO CART

Socom Gear 1911 MEU Airsoft Gas Gun TAN

$139.99 ADD TO CART

VFC FN SCAR-H Airsoft AEG Gun Rifle Blk

$406.99 ADD TO CART
 

M4 M16 Airsoft Gun Internal Upgrades

Internal upgrade parts specifically & designed for use w/ the M4 or M16 Airsoft electric, gas & spring operated rifles.

*Modify S100 Airsoft Tune Up Kit- M4

Item Code: AC-UP-MD-TK-SM4
Airsoft Gun Style: M4 M16 Airsoft Gun Internal Upgrades
Manufacturer: Mad Bull & Bravo Airosft
Stock: Ships in 1 Weeks
 
Modify Full Tune Up Speed Kit For M4
Features:
- Ported Piston Head
- Double O-ring Cylinder Head
- Smooth Bore Cylinde
- Reinforced Piston
- Air Nozzle
- S100 Spring
- Ball Bearing Spring Guide
- Metal Bushings
- Anti-reverse Latch
- Tappet Plate
- Synthetic Lubricant
- MOD FTK S M4
*Modify S100 Airsoft Tune Up Kit- M4
Price:$105.00  per EACH
QTY:   Add to cart Add to Wish List
 

WE Airsoft M4 Open Bolt Conversion Kit

Item Code: AC-UPI-WE-OBKIT
Airsoft Gun Style: M4 M16 Airsoft Gun Internal Upgrades
Manufacturer: TM (Tokyo Marui) WE & Win Gun
Stock: Ships in 6 Weeks
 
WE M4 Airsoft Complete Close Bolt to Open Bolt Conversion Kit
- Kit include Bolt Carrier Group & Nozzle
- Trigger Group Assembly
- Inner Barrel
- Hop-Up Chamber
- Dust Cover
- Bolt Catch
- Magazine Flow Nozzle
- Detent Spring
- Airsoft Upgrade Video Available - Click for More Info

Please note, kit does NOT include a complete rifle. It only include necessary parts to convert your WE close bolt M4 into an open bolt M4.

WE Airsoft M4 Open Bolt Conversion Kit
Price:$89.99  per EACH
Video Review - Click on gun to see airsoft gun review
QTY:   Add to cart Add to Wish List
 

WE Airsoft M4 Closed Bolt Repair Kit

Item Code: AC-UPI-WE-CBKIT
Airsoft Gun Style: M4 M16 Airsoft Gun Internal Upgrades
Manufacturer: TM (Tokyo Marui) WE & Win Gun
Stock: Yes & Ships w/in 24Hrs*
 
WE M4 Airsoft Complete Close Bolt Repair Kit
Kit include:
- Bolt Carrier Group & Nozzle
- Trigger Group Assembly
- Inner Barrel
- Hop-Up Chamber
- Dust Cover
- Bolt Catch
- Airsoft Upgrade Video Available - Click for More Info

Please note, kit does NOT include a complete rifle. It only include necessary parts to repair your WE close bolt M4.

WE Airsoft M4 Closed Bolt Repair Kit
Price:$69.99  per EACH
QTY:   Add to cart Add to Wish List
 

Systema Airsoft M16-A1/VN Energy Gearbox

Item Code: AC-UPI-S16R-150
Airsoft Gun Style: M4 M16 Airsoft Gun Internal Upgrades
Manufacturer: Systema
Stock: Ships in 3 Weeks
 
Systema M16-A1/VN Complete Energy Mecha-Box EN-GB16RD-15-0
- Complete Drop In Gear Box for Full Stock Rear Battery M16 / M15 with M150 Upgrade Spring for 470 - 500 FPS
- All internal parts completed upgraded with Systema Parts (gears, bearings, tappet late, cylinder, bearing spring guide rod, selector plate, low resistance wires)
- Completely Reinforced Heavy Duty Alloy Gear Box
- Includes All Helical Super Torque Up Gear Set with Bore Up Cylinder Set
Systema Airsoft M16-A1/VN Energy Gearbox
Price:$259.99  per EACH
QTY:   Add to cart Add to Wish List
 

Systema M16A2 / SR16 Gear Mech Box M120

Item Code: AC-UPI-S16R-120
Airsoft Gun Style: M4 M16 Airsoft Gun Internal Upgrades
Manufacturer: Systema
Stock: Ships in 3 Weeks
 
Systema Complete Mecha-Box for M16-A2 / M15 / SR16
- Complete Drop In Gear Box for Full Stock Rear Battery M16 / M15 with M120 Upgrade Spring for 370 - 400 FPS
- All internal parts completed upgraded with Systema Parts (gears, bearings, tappet late, cylinder, bearing spring guide rod, selector plate, low resistance wires)
- Completely Reinforced Heavy Duty Alloy Gear Box
- Includes Torque Up Gear Set with Teflon Cylinder
- Not Compatible with ICS or Olympic Arms
Systema M16A2 / SR16 Gear Mech Box M120
Price:$239.99  per EACH
QTY:   Add to cart Add to Wish List
 

Systema M4A1 Energy Gearbox GB16V25F-12

Item Code: AC-UPI-S16F-12X
Airsoft Gun Style: M4 M16 Airsoft Gun Internal Upgrades
Manufacturer: Systema
Stock: Yes & Ships w/in 24Hrs*
 
Systema M4-A1/M4-RIS/S-System Energy Complete Mecha Gearbox EN-GB16V25F-12-2
- Complete Drop In Gear Box for Retractable Stock Front Battery M4 / M4-A1/ M4 RIS with M120 Upgrade Spring for 370 - 400 FPS
- All internal parts completed upgraded with Systema Parts (gears, bearings, tappet late, cylinder, bearing spring guide rod, selector plate, low resistance wires)
- Includes Torque Up Gear Set with Teflon Cylinder
- Completely Reinforced Heavy Duty Alloy Gear Box
...
Systema M4A1 Energy Gearbox GB16V25F-12
Price:$239.99  per EACH
QTY:   Add to cart Add to Wish List
 

MODIFY M4-A1 Hi-Torque Complete Gear Box

Item Code: AC-UPI-MOD-814
Airsoft Gun Style: M4 M16 Airsoft Gun Internal Upgrades
Manufacturer: Mad Bull & Bravo Airosft
Stock: Yes & Ships w/in 24Hrs*
 
MODIFY M4-A1 Hi-Torque Complete V2 Gearbox
Include:
- M120 Spring
- Rotary Spring Guide
- Tappet Plate
- Modular Gear Set (21.6)
- Seletor Plate
- PolyCarb Piston
- PolyCarb Piston Head w/ Bearing
MODIFY M4-A1 Hi-Torque Complete Gear Box
Price:$209.99  per EACH
QTY:   Add to cart Add to Wish List
 

MODIFY M4-A1 Hi-Speed Complete Gear Box

Item Code: AC-UPI-MOD-804
Airsoft Gun Style: M4 M16 Airsoft Gun Internal Upgrades
Manufacturer: Mad Bull & Bravo Airosft
Stock: Yes & Ships w/in 24Hrs*
 
MODIFY M4-A1 Hi-Speed Complete V2 Gearbox
Include:
- M100 Spring
- Rotary Spring Guide
- Tappet Plate
- Modular Gear Set (16.32.1)
- Seletor Plate
- PolyCarb Piston
- PolyCarb Piston Head w/ Bearing
MODIFY M4-A1 Hi-Speed Complete Gear Box
Price:$219.99  per EACH
QTY:   Add to cart Add to Wish List
 

ICS M4 Upgraded Upper Gearbox MA-56

Item Code: AC-UPI-MA120K
Airsoft Gun Style: M4 M16 Airsoft Gun Internal Upgrades
Manufacturer: ICS (I Chih Shivan) & VFC (Vega Force)
Stock: Ships in 3 Weeks
 
ICS M4 Upgraded Upper Gear Box with M120 Spring
Includes: Upper Gear Box, M120 Spring, Metal Bearing Spring Guide Rod, Tappet Plate, Piston, Piston Head, Ported Cylinder, Cylinder Head, and Feed Nozzle.
Compatible with ICS M4 or M16
Upgrades FPS to 400
ICS M4 Upgraded Upper Gearbox MA-56
Price:$59.99  per EACH
QTY:   Add to cart Add to Wish List
 

ICS M4 M16 Gearbox Screws Set MA-139

Item Code: AC-UPI-ICS-M139
Airsoft Gun Style: M4 M16 Airsoft Gun Internal Upgrades
Manufacturer: ICS (I Chih Shivan) & VFC (Vega Force)
Stock: Yes & Ships w/in 24Hrs*
 
ICS M4 M16 Gearbox Screw Set MA-139
- 4 Long Screws
- 8 Short Screws
- Loctite'd Screw Ends for More Secure Fitment
ICS M4 M16 Gearbox Screws Set MA-139
Price:$4.99  per EACH
QTY:   Add to cart Add to Wish List
 

Systema M4A1 Full Tune Up Kit (FTK21)

Item Code: AC-UPI-FTK-21
Airsoft Gun Style: M4 M16 Airsoft Gun Internal Upgrades
Manufacturer: Systema
Stock: Yes & Ships w/in 24Hrs*
 
The ULTIMATE FULL UPGRADE KIT for your M4! Ver 2 AEG Gear Box
Includes (Top to bottom): Hexical Gear Set, Selector Plate, Bore Up Cylinder, Silent Piston Head, Silent Cylinder Head, Cylinder Nozzle, Polycarbonate Piston, Ball Bearings, Shims, Anti-reversal Latch, Cut Off Lever, Bearing Spring Guide Rod, M130 Spring
For Basic Airsoft Gear Box Tutorial
Systema M4A1 Full Tune Up Kit (FTK21)
Price:$149.99  per EACH
QTY:   Add to cart Add to Wish List
 

PolarStar Airsoft M4/16 Fusion Engine V2

Item Code: AC-UPI-FEV2-M4
Airsoft Gun Style: M4 M16 Airsoft Gun Internal Upgrades
Manufacturer: PolarStar Airsoft
Stock: Yes & Ships w/in 24Hrs*
 
PolarStar M4 M16 Airsoft AEG Fusion Engine Kit V2 GEN. 3
- Designed, manufactured and built in the U.S.A.
- Assembled from CNC machined aluminum components
- User selectable Semi/Full Auto, Semi Auto Only and Variable Burst modes
- Open Bolt and Closed Bolt firing modes
- Independently adjustable velocity and cyclic rate
- Interchangeable air nozzles to shift the velocity adjustment range up or down
PolarStar Airsoft M4/16 Fusion Engine V2
Price:$500.00  per EACH
QTY:   Add to cart Add to Wish List
 

Systema Energy M16-A2/SR16-M4 Gearbox

Item Code: AC-UPI-EN-GB150
Airsoft Gun Style: M4 M16 Airsoft Gun Internal Upgrades
Manufacturer: Systema
Stock: Yes & Ships w/in 24Hrs*
 
Systema Energy M16-A2/SR16-M4 Gearbox M150
- Complete Drop In Gear Box for Full Stock Rear Battery M16 / M15 with M150 Upgrade Spring
- All internal parts completed upgraded with Systema Parts (gears, bearings, tappet late, cylinder, bearing spring guide rod, selector plate, low resistance wires)
- Completely Reinforced Heavy Duty Gear Box
- Includes Reinforced Gear Set & Proprietary Pinion Gear for Motor
- Polycarb Energy Piston
- Super High Conductive Wire Set w/ ...
Systema Energy M16-A2/SR16-M4 Gearbox
Price:$224.99  per EACH
QTY:   Add to cart Add to Wish List
 

Deep Fire M4 M120 Full Tune Up Kit

Item Code: AC-UPI-DF-FTK51
Airsoft Gun Style: M4 M16 Airsoft Gun Internal Upgrades
Manufacturer: Deep Fire
Stock: Yes & Ships w/in 24Hrs*
 
Great Enlarged M120 Full Tune Up Kit / Upgrade Kit for for your M4! AEG Gear Box
Enlarged Kit for Extra Air Volume
Includes : Nozzle (AC-DF-CPN16P), Cylinder Head (AC-UPI-DF-CPC07), Cylinder (AC-UPI-DF-CPC17), Piston Head (AC-UPI-DF-CPP18A), Piston (AC-UPI-DF-CPP19), Spring Guide Rod (AC-UPI-DF-CPS01), Bushings (AC-UPI-DF-CPO16), Tappet Plate (AC-UPI-DF-CPO33) M120 Spring
Deep Fire M4 M120 Full Tune Up Kit
Price:$109.99  per EACH
Written Review - Click on gun to see airsoft gun review
QTY:   Add to cart Add to Wish List
 

Boyi Dboys M4 7mm Ver. 2 Upgrade Gearbox

Item Code: AC-UPI-BI-15-GB
Airsoft Gun Style: M4 M16 Airsoft Gun Internal Upgrades
Manufacturer: Boyi Dboys
Stock: Ships in 8 Weeks
 
Boyi Dboys M4 7mm Version 2 Upgrade Gearbox
- Complete with all upgraded Internals, such as 7mm bushings, M120 spring, reinforced set of metal gears, and premium grease lubrication. This gearbox is high performance and requires professional installation for optimum performance.
Boyi Dboys M4 7mm Ver. 2 Upgrade Gearbox
Price:$59.99  per EACH
QTY:   Add to cart Add to Wish List
 

APS ASR AEG M4 Airsoft Full Gear Box V2

Item Code: AC-UPI-APS-V2
Airsoft Gun Style: M4 M16 Airsoft Gun Internal Upgrades
Manufacturer: APS Airsoft Rifle AEG
Stock: Yes & Ships w/in 24Hrs*
 
APS ASR AEG M4 Completed V2 Gear Box
Specifications:
- Full Gear Box at an Unbeatable Price! - Compatitible with most of the AEG guns in the world
- Made of Metal
- Completed Gear Box without Motor
- Electric Blow Back Gear Box
- Wire set included
APS ASR AEG M4 Airsoft Full  Gear Box V2
Price:$54.99  per EACH
QTY:   Add to cart Add to Wish List
 
 

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