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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.


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TTI Airsoft 6.03mm Inner Barrel for Tokyo Marui Hi-Capa GBB Pistols (113mm)

TTI Airsoft 6.03mm Inner Barrel for Tokyo Marui Hi-Capa GBB Pistols (113mm)

$26.50$23.85

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Gate EON Complete V2 Gearbox with TITAN II Bluetooth
qualifies for free shipping

Gate EON Complete V2 Gearbox with TITAN II Bluetooth

$399.00$359.10

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Acetech LVP Mosfet Unit

Acetech LVP Mosfet Unit

$26.00

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Perun MOSFET for AUG Series AEG Gearboxes

Perun MOSFET for AUG Series AEG Gearboxes

$109.00$98.10

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Atlas Custom Works TM 1911A1/MEU Recoil Spring Plug & Guide Rod (Gold)

Atlas Custom Works TM 1911A1/MEU Recoil Spring Plug & Guide Rod (Gold)

$13.99$12.59

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Atlas Custom Works Lightweight CNC Aluminum Bolt for AAP-01 GBB Pistol (Silver)

Atlas Custom Works Lightweight CNC Aluminum Bolt for AAP-01 GBB Pistol (Silver)

$32.49$29.24

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Atlas Custom Works Lightweight CNC Aluminum Bolt for AAP-01 GBB Pistol (Red)

Atlas Custom Works Lightweight CNC Aluminum Bolt for AAP-01 GBB Pistol (Red)

$32.49$29.24

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Atlas Custom Works Lightweight CNC Aluminum Bolt for AAP-01 GBB Pistol (Purple)

Atlas Custom Works Lightweight CNC Aluminum Bolt for AAP-01 GBB Pistol (Purple)

$32.49$29.24

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Atlas Custom Works Lightweight CNC Aluminum Bolt for AAP-01 GBB Pistol (Gold)

Atlas Custom Works Lightweight CNC Aluminum Bolt for AAP-01 GBB Pistol (Gold)

$32.49$29.24

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Arctrurus CAT Adjustble 18:1 Gear Set

Arctrurus CAT Adjustble 18:1 Gear Set

$25.00

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Arcturus CAT V2 CENTAUR Split Gearbox Sheel w/ Screw

Arcturus CAT V2 CENTAUR Split Gearbox Sheel w/ Screw

$35.00

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Arcturus V3 Microswitch Fire Control Group Set

Arcturus V3 Microswitch Fire Control Group Set

$48.00

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Arcturus V2 Microswitch Fire Control Parts Kit

Arcturus V2 Microswitch Fire Control Parts Kit

$12.50

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Arcturus ARCTURUS MUR Receiver Body Pin

Arcturus ARCTURUS MUR Receiver Body Pin

$8.00

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Laylax Strike Hop Arm for Tokyo Marui M4A1 MWS GBBR

Laylax Strike Hop Arm for Tokyo Marui M4A1 MWS GBBR

$26.00$23.40

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GATE TITAN II Bluetooth for Ver.2 Gearboxes (Rear Wired)

GATE TITAN II Bluetooth for Ver.2 Gearboxes (Rear Wired)

$148.35$133.52

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Arcturus Gear Set for Ambi Selector

Arcturus Gear Set for Ambi Selector

$15.00

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Ambi Selector Set for LITE Series AEGs

Ambi Selector Set for LITE Series AEGs

$15.00

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Arcturus Microswitch Gearbox M4 Trigger Unit

Arcturus Microswitch Gearbox M4 Trigger Unit

$8.00

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Arcturus High Torque Short Type Neodymium Motor w/ MIM Pinion Gear 19 TPA

Arcturus High Torque Short Type Neodymium Motor w/ MIM Pinion Gear 19 TPA

$41.50$37.35

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Arcturus High Torque 28K AEG Motor (Long Type)

Arcturus High Torque 28K AEG Motor (Long Type)

$45.99$41.39

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Maxx Model CNC Aluminum Advanced Speed Trigger for Scorpion EVO Style B (Black)

Maxx Model CNC Aluminum Advanced Speed Trigger for Scorpion EVO Style B (Black)

$34.49$31.04

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Maxx Model CNC Aluminum Advanced Speed Trigger for Scorpion EVO Style B (Red)

Maxx Model CNC Aluminum Advanced Speed Trigger for Scorpion EVO Style B (Red)

$34.49$31.04

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Maxx Model CNC Aluminum Advanced Speed Trigger for Wolverine MTW Style C (Red)

Maxx Model CNC Aluminum Advanced Speed Trigger for Wolverine MTW Style C (Red)

$32.49$29.24

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Maxx Model CNC Aluminum Advanced Speed Trigger for Wolverine MTW Style B (Red)

Maxx Model CNC Aluminum Advanced Speed Trigger for Wolverine MTW Style B (Red)

$32.49$29.24

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Maxx Model CNC Aluminum Advanced Speed Trigger for Wolverine MTW Style E (Red)

Maxx Model CNC Aluminum Advanced Speed Trigger for Wolverine MTW Style E (Red)

$34.49$31.04

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Maxx Model Hop-Up Chamber Inlet Adapter (OD11mm)

Maxx Model Hop-Up Chamber Inlet Adapter (OD11mm)

$13.99$12.59

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Maxx Model CNC Aluminum Hop-Up Chamber for ASG CZ Scorpion EVO-3 Airsoft Rifles

Maxx Model CNC Aluminum Hop-Up Chamber for ASG CZ Scorpion EVO-3 Airsoft Rifles

$61.49$55.34

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Maxx Model CNC Aluminum Hopup Chamber for M4/M16 Series Airsoft AEG Rifles M4W

Maxx Model CNC Aluminum Hopup Chamber for M4/M16 Series Airsoft AEG Rifles M4W

$72.99$65.69

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Solink High Power Spring M85 (280 - 310 FPS)

Solink High Power Spring M85 (280 - 310 FPS)

$3.00$2.70

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Solink High Power Spring M90 (280 - 340 FPS)

Solink High Power Spring M90 (280 - 340 FPS)

$3.00$2.70

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Solink High Power Spring M100 (320 - 380 FPS)

Solink High Power Spring M100 (320 - 380 FPS)

$3.00$2.70

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Solink High Power Spring M110 (330 - 390 FPS)

Solink High Power Spring M110 (330 - 390 FPS)

$3.00$2.70

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Solink High Power Spring M120 (360 - 450 FPS)

Solink High Power Spring M120 (360 - 450 FPS)

$3.00$2.70

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Solink High Power Spring M130 (420 - 500 FPS)

Solink High Power Spring M130 (420 - 500 FPS)

$3.00$2.70

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Solink High Power Spring M140 (450 - 550 FPS)

Solink High Power Spring M140 (450 - 550 FPS)

$5.00$4.50

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Solink High Power Spring M150 (480 - 600 FPS)

Solink High Power Spring M150 (480 - 600 FPS)

$5.00$4.50

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Solink High Power Spring M160 (530 - 650 FPS)

Solink High Power Spring M160 (530 - 650 FPS)

$5.00$4.50

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Solink High Power Spring M170 (550 - 700 FPS)

Solink High Power Spring M170 (550 - 700 FPS)

$5.00$4.50

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Solink Motor Shaft Guide Bushing (Black)

Solink Motor Shaft Guide Bushing (Black)

$5.00

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Solink CNC Aluminum Drop-In End Bell (Black)

Solink CNC Aluminum Drop-In End Bell (Black)

$8.00$7.20

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Solink CNC Aluminum Drop-In End Bell (Blue)

Solink CNC Aluminum Drop-In End Bell (Blue)

$8.00

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Solink CNC Aluminum Drop-In End Bell (Red)

Solink CNC Aluminum Drop-In End Bell (Red)

$8.00

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Solink Rubber Drop-In End Bell (Blue)

Solink Rubber Drop-In End Bell (Blue)

$5.00

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Solink Rubber Drop-In End Bell (Color: Red)

Solink Rubber Drop-In End Bell (Color: Red)

$5.00$4.50

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Solink Gold Plated Motor Connectors Set for Airsoft w/ Shrink Tubing

Solink Gold Plated Motor Connectors Set for Airsoft w/ Shrink Tubing

$2.00$1.80

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Solink Silver Plated Motor Connectors Set for Airsoft w/ Shrink Tubing

Solink Silver Plated Motor Connectors Set for Airsoft w/ Shrink Tubing

$2.00$1.80

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Solink Steel Motor Pinion Gear for Airsoft AEG Motors (D-Type)

Solink Steel Motor Pinion Gear for Airsoft AEG Motors (D-Type)

$3.00$2.70

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Solink Steel Motor Pinion Gear for Airsoft AEG Motors (O-Type)

Solink Steel Motor Pinion Gear for Airsoft AEG Motors (O-Type)

$3.00$2.70

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Solink Lightweight Nylon Polymer Piston w/ 15 Reinforced Steel Teeth

Solink Lightweight Nylon Polymer Piston w/ 15 Reinforced Steel Teeth

$12.00$10.80

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Laylax PSS10 120SP Spring for TM VSR-10 Bolt Action Airsoft Sniper Rifles

Laylax PSS10 120SP Spring for TM VSR-10 Bolt Action Airsoft Sniper Rifles

$20.00$18.00

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Laylax VSR-10 G-Spec 303mm Tight Bore Inner Barrel

Laylax VSR-10 G-Spec 303mm Tight Bore Inner Barrel

$78.00

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Laylax VSR-10 Series 430mm Tight Bore Inner Barrel

Laylax VSR-10 Series 430mm Tight Bore Inner Barrel

$98.00$88.20

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Laylax VSR-10 Series 555mm Tight Bore Inner Barrel

Laylax VSR-10 Series 555mm Tight Bore Inner Barrel

$98.00

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Laylax M40A5 Series 280mm Tight Bore Inner Barrel

Laylax M40A5 Series 280mm Tight Bore Inner Barrel

$78.00

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Laylax 50mm Short Stroke Spacer Kit for Spring VSR-10 Airsoft Sniper Rifles

Laylax 50mm Short Stroke Spacer Kit for Spring VSR-10 Airsoft Sniper Rifles

$33.00$29.70

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Laylax PSS10 90SP Spring for Airsoft Snipers

Laylax PSS10 90SP Spring for Airsoft Snipers

$23.00$20.70

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Solink Motor Shaft Guide Bushing (Blue)

Solink Motor Shaft Guide Bushing (Blue)

$5.00

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Laylax VSR Hard First Sear

Laylax VSR Hard First Sear

$47.00

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Laylax VSR Hard Second Sear

Laylax VSR Hard Second Sear

$35.00

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Laylax VSR Low Profile Safety Lever

Laylax VSR Low Profile Safety Lever

$45.00

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Laylax PSS10 Long Air Seal Chamber Bucking

Laylax PSS10 Long Air Seal Chamber Bucking

$19.49$17.54

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Laylax PSS Series Cylinder Head Opener (Pink)

Laylax PSS Series Cylinder Head Opener (Pink)

$24.00$21.60

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Classic Army Max M2 Speed & Torque Motor (Long)

Classic Army Max M2 Speed & Torque Motor (Long)

$69.99$62.99

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Arcturus HCL M130 AEG Spring

Arcturus HCL M130 AEG Spring

$16.00

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Arcturus HCL M120 AEG Spring

Arcturus HCL M120 AEG Spring

$16.00

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Arcturus HCL M110 AEG Spring

Arcturus HCL M110 AEG Spring

$16.00

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Arcturus HCL M100 AEG Spring

Arcturus HCL M100 AEG Spring

$16.00

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Arcturus HCL M95 AEG Spring

Arcturus HCL M95 AEG Spring

$16.00

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Arcturus HCL M90 AEG Spring

Arcturus HCL M90 AEG Spring

$16.00

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Solink 480 Short Type Super High Torque Motor

Solink 480 Short Type Super High Torque Motor

$32.00$30.40

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Solink 480 Long Type High Torque Motor

Solink 480 Long Type High Torque Motor

$37.00$33.30

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Solink 480 Short Type High Speed Motor

Solink 480 Short Type High Speed Motor

$32.00$28.80

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Solink 480 Long Type High Speed Motor

Solink 480 Long Type High Speed Motor

$34.00$30.60

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Solink Slim AEG Brushless Motor

Solink Slim AEG Brushless Motor

$126.00$113.40

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Double Bell Inlet Valve for Double Bell 98K Gas Rifles

Double Bell Inlet Valve for Double Bell 98K Gas Rifles

$6.99$6.29

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Perun Basic Unit Mosfet for AEG Airsoft Guns

Perun Basic Unit Mosfet for AEG Airsoft Guns

$12.00$10.80

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Gate EON V2 Gearbox Shell for AEG Airsoft Gun Rev. 2 (Titanium)

Gate EON V2 Gearbox Shell for AEG Airsoft Gun Rev. 2 (Titanium)

$126.40$113.76

Save: $12.64
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Real Power Steel AKM Receiver & Outer Barrel Set for TM AKM GBB Airsoft Rifle
qualifies for free shipping

Real Power Steel AKM Receiver & Outer Barrel Set for TM AKM GBB Airsoft Rifle

$219.99$197.99

Save: $22.00
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Bolt Airsoft Rear Wiring Set for M4 AEG Airsoft Rifles

Bolt Airsoft Rear Wiring Set for M4 AEG Airsoft Rifles

$17.00$16.15

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Bolt Airsoft CNC Aluminum Piston Set

Bolt Airsoft CNC Aluminum Piston Set

$39.00$35.10

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Lancer Tactical 6.05 x 320mm Aluminum Inner Barrel

Lancer Tactical 6.05 x 320mm Aluminum Inner Barrel

$30.00$27.00

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Arcturus 8mm Version 3 QD Gearbox Shell for AK Series AEG Rifles

Arcturus 8mm Version 3 QD Gearbox Shell for AK Series AEG Rifles

$30.00$27.00

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Arcturus 25K High Torque Neodymium Motor (Long Type)

Arcturus 25K High Torque Neodymium Motor (Long Type)

$42.00$37.80

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Arcturus CNC Machined Steel 13:1 Gear Set with Delay Chip

Arcturus CNC Machined Steel 13:1 Gear Set with Delay Chip

$30.00$27.00

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Laylax Gold Pin Connector Set for Mini Connectors

Laylax Gold Pin Connector Set for Mini Connectors

$11.00

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Laylax Compact Air Seal Bucking for TM NGRS & AEP

Laylax Compact Air Seal Bucking for TM NGRS & AEP

$19.00$17.10

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Laylax Aero Cylinder Head for Next Gen. M4A1 and Scar AEGs

Laylax Aero Cylinder Head for Next Gen. M4A1 and Scar AEGs

$29.00$27.55

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Prometheus 8mm Sintered Alloy Bushings

Prometheus 8mm Sintered Alloy Bushings

$19.00

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Laylax M9A1/M92F Gas Route Aero Bucking

Laylax M9A1/M92F Gas Route Aero Bucking

$13.00

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Prometheus High Speed Hard Pinion Motor (Long type)

Prometheus High Speed Hard Pinion Motor (Long type)

$67.00$63.65

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Laylax Next Gen. Hard Piston for SCAR AEGs

Laylax Next Gen. Hard Piston for SCAR AEGs

$43.00

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Prometheus High Cycle Hard Piston

Prometheus High Cycle Hard Piston

$36.00

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Laylax EG AEG Spring Guide (V2)

Laylax EG AEG Spring Guide (V2)

$21.00$19.95

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Prometheus 6.03 EG Inner Barrel for the MP5 PDW (141mm)

Prometheus 6.03 EG Inner Barrel for the MP5 PDW (141mm)

$54.00$51.30

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Prometheus Hard Selector Plate NEO for MP5s

Prometheus Hard Selector Plate NEO for MP5s

$13.00

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Laylax Perfect Tappet Plate for Tokyo Marui Spec Ver. 3 Gearbox AEGs

Laylax Perfect Tappet Plate for Tokyo Marui Spec Ver. 3 Gearbox AEGs

$23.00$21.85

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Prometheus EG Precision AEG Inner Barrel for M4A1+/SR16/551+  (407mm)

Prometheus EG Precision AEG Inner Barrel for M4A1+/SR16/551+ (407mm)

$71.00$63.90

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Laylax 6.00 Power Barrel for Umarex Glocks (97mm)

Laylax 6.00 Power Barrel for Umarex Glocks (97mm)

$30.00$27.00

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Bolt Airsoft Anti-Reversal Latch for V2 Gearbox (Set of 2)

Bolt Airsoft Anti-Reversal Latch for V2 Gearbox (Set of 2)

$11.00$9.90

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Bolt Airsoft Trigger Switch Blade for V2 Gearbox

Bolt Airsoft Trigger Switch Blade for V2 Gearbox

$9.00

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Lancer Tactical Airsoft AEG 23K High Performance Motor (Short)

Lancer Tactical Airsoft AEG 23K High Performance Motor (Short)

$16.00$15.20

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Lancer Tactical Airsoft AEG 23K High Performance Motor (Long)

Lancer Tactical Airsoft AEG 23K High Performance Motor (Long)

$16.00$14.40

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Golden Eagle Airsoft Recoil Spring Guide Plug for GBB 1911 Airsoft Pistol

Golden Eagle Airsoft Recoil Spring Guide Plug for GBB 1911 Airsoft Pistol

$4.50$4.28

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Golden Eagle Airsoft Hammer Assembly for GBB 1911 Airsoft Pistol

Golden Eagle Airsoft Hammer Assembly for GBB 1911 Airsoft Pistol

$10.00$9.00

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Golden Eagle Airsoft Outlet Valve for CO2 1911 Mags

Golden Eagle Airsoft Outlet Valve for CO2 1911 Mags

$8.00$7.20

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Golden Eagle Airsoft Inlet Valve for Hi Capa Mags

Golden Eagle Airsoft Inlet Valve for Hi Capa Mags

$4.50$4.05

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MTW Advanced Electronics Kit

MTW Advanced Electronics Kit

$140.00$126.00

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Wolverine Airsoft V3 12" Wire Harness Gen 2

Wolverine Airsoft V3 12" Wire Harness Gen 2

$25.00

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Wolverine Airsoft V2 Trigger Board

Wolverine Airsoft V2 Trigger Board

$20.00

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Wolverine Airsoft HYDRA Gen 2 P90 Cylinder w/ Premium Edition Electronics
qualifies for free shipping

Wolverine Airsoft HYDRA Gen 2 P90 Cylinder w/ Premium Edition Electronics

$456.75$411.08

Save: $45.68
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Polarstar UGS CO2 Insert - 12g Milspec

Polarstar UGS CO2 Insert - 12g Milspec

$130.75

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Polarstar UGS CO2 Insert - 33gMilspec

Polarstar UGS CO2 Insert - 33gMilspec

$111.00

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Polarstar UGS End Plate Assembly

Polarstar UGS End Plate Assembly

$34.00

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Polarstar UGS Stock Rail

Polarstar UGS Stock Rail

$32.00

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Polarstar UGS Type 1 12g CO2 Milspec (RS Spec)
qualifies for free shipping

Polarstar UGS Type 1 12g CO2 Milspec (RS Spec)

$312.00

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Polarstar UGS Type 1 33g CO2 Milspec (RS Spec)
qualifies for free shipping

Polarstar UGS Type 1 33g CO2 Milspec (RS Spec)

$288.00

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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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