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  • CQBR
  • CARBINE (DSG)
  • CARBINE (SSG)
  • DMR

STATS

PERFORMANCE

This Gearbox is built to dominate in CQB settings where speed and reliability are needed to push onto the objective.

STATS

Performance

This Gearbox is built to dominate in CQB settings where speed and reliability are needed to push onto the objective.

400fps

Muzzle Velocity

.2g BBs hopped

45rps

Rate of Fire

Suppression capability

20ms

Trigger Response

Faster than you

225ft

Effective Range

.32g BBs

350fps

Muzzle Velocity

.2g BBs hopped

55rps

Rate of Fire

11.1v Lipo

22ms

Complete Cycle

7ms pre-cock

200ft

Effective Range

.32g BBs

350fps

Velocity

.2g BBs hopped

55rps

Rate of Fire

11.1 V LiPo Battery

22ms

Complete Cycle time

7ms with pre-cock

200ft

Range

.32g BBs

Designed for R-Hop. Accuracy and range are the single most deciding success factors in any engagement. Unlock the most of our build with our R-Hop Barrel Assembly.

Recommended

Torque and Speed. You will need a high quality motor to run this gearbox. In case you do not have the motor we recommend, pick one up with your gearbox.

Recommended

High Performance DIY

Ready out of the box, this gearbox is pre-assembled by our technicians with everything you need for a kick ass build. Installing our gearbox is the most effective and convenient method towards achieving high performance results with your AEG.

  • Curated Selection
  • Mission Specific
  • Pro-Tips

Cutting Edge Build List

Since the beginning, our team has researched and tested nearly every rifle, part, and modification on the market so we can offer our customers the highest quality available.

A Perfect Fit

With our selection of gearboxes, we are pursuing the goal of offering a high quality build for nearly every type of AEG on the market.

In-depth Guidance

Our team of experienced technicians have created a tutorial on installing this gearbox in your rifle. Explaining both the basic and expert level steps necessary for an easy and thorough installation, maintenance, and troubleshooting process.

Coming soon*

  • Curated Selection
  • Mission Specific
  • Pro-Tips

Curated Selection

Since the beginning, our team has researched and tested nearly every rifle, part, and modification on the market so we can offer our customers the highest quality available.

Mission Specific

With our selection of gearboxes, we are pursuing the goal of offering a high quality build for nearly every type of AEG on the market.

In-depth Guidance

Our team of experienced technicians have created a tutorial on installing this gearbox in your rifle. Explaining both the basic and expert level steps necessary for an easy and thorough installation, maintenance, and troubleshooting process.

Coming soon*

TECHNICAL SPECS.

The OCAW Gearbox

The same Gearbox build we use in our OCAW MK11DLP, this gearbox build is designed to outperform with the most advanced parts and modifications.

Compatibility*

Tokyo Mauri V2 Type AEGs*

ASG Boost 30k Motor

200mm-318mm Inner Barrel Length

R-Hop barrel assembly recommended

11.1v LiPo Batteries Deans

PTS EPG-C Motor Grip

*Using anything else than the above listed is not advised and could result in poor performance and damage.

Core Features

Complete pre-upgraded Retro Arms Gearbox

Lightweight and durable 7075 CNC Aluminum Gearbox shell

Siegetek precision DSG set

Umbrella 8mm Caged Bearings

GATE Titan V2 Advanced

Build List

Everything included with this Gearbox.

Retro Arms V2 8mm Gearbox QSC Shell AW EN7075 T651

The Retro Arms V2 Gearbox shell is the ultimate gearbox on the market.

Unparalleled strength. Unmatched lightness. This gearbox is the perfect ground stone for every high end custom build.

Gate TITAN V2 Advanced Rear Wired

The Titan V2 Advanced MOSFET from GATE.

Enhance your experience by shortening the trigger pull, allowing for faster follow up semi-automatic firing. The settings on the MOSFET furthermore allow for different technical features which our technicians adjust for you in the factory, including features such as trigger sensitivity, lowest active breaking for even better trigger response and durability.

Umbrella Piston + Piston Head Assembly (AOE + Spacer)

Umbrella modified and pre-assembled. SHS FMR Piston (Type 1); Lonex POM Piston Head.

This piston assembly is installed to deliver exceptional high speed performance and reliability. We test the Hardness of each piston rack before installation for absolute QC Assurance.

Umbrella Armory 8mm Caged Bearing Set

Our Caged bearing set has been used and abused in even the most high performance AEGs we have ever built.

We consider these one of the best options for any high end AEG platform. Tested by time and abused by our technicians. These bearings are our go to setup for all our builds. Expect them to last in even the most demanding setups, while offering a modest increase in rate of fire and lower motor heat.

Siegetek Concepts Generation 2 Cyclone Precision Airsoft AEG Gear Set (Type: V2/3 / 20.8:1 8-Tooth)

The 20:1 DSG Gearset is perfect for performance and long term efficiency/reliability.

Siegetek gears are some of the best gears on the market due to their steel composition and precision laser welded bodies that allow our techs to install them in some of the most high performance builds without failure.

*Picture listed shows a 9-tooth DSG, we use a 9-tooth DSG but cut it down to 8-tooth.

Guarder SP150 Spring

Guarder Springs are popular due to their consistent performance and design in even the most high end builds.

Our Go-to DSG spring for perfect 350 FPS Consistency.

Guarder Tappet Plate

Light weight and durable, perfect for high speed use.

Guarder tappet plates are known for being incredibly resilient in high speed builds due to their strength and flexibility. We cut and modify the tappet plate for this specific build.

G&G Tappet Spring

For shot to shot consistency in high speed action.

This tappet spring is used in a number of our upgraded rifles and has delivered long term reliability.

*Tappet Spring shown is unmodified*

VFC POM Air Nozzle 

VFC M4 type Polyoxymethylene (POM) Air Nozzle with integral O-Ring.

This Air Nozzle has been tried and true to work in an incredible variety of builds to provide maximum air seal and efficiency.

Modify V2/3 Aluminum Cylinder Head

High Performance Aluminium Construction, Double O-Ring for optimal Air-Seal.

We utilize the "Bore-Up" design with this cylinder head to increase air flow and efficiency with this build.

Retro Arms CNC Red J-Type Trigger

This Trigger is made by the Legendary Czech Airsoft part OEM, known for using true Aircraft Aluminium, EN AW 7075 T651 and Precision CNC machining to craft incredible parts. This trigger is our favorite in part to aesthetic design and function.

The trigger is not only just for looks, but we have modified it for hair trigger functionality with a shortened reset. Making quick semi-automatic follow up shots both tactile and easy with this trigger.

Umbrella Armory Patch

As Seen on TV!

This Gearbox will be shipped with a Large UA Patch.

FAQ

FAQ

In case you can not find an answer to your question, please feel free to contact us via Chat, Email or Phone.

How long does this take to arrive?

Our current lead times for our Gearboxes can take up to 2 weeks.

The shipping option and the corresponding time frame you choose reflects the delivery time after your order has been sent out.
If there are other items in your order you would like us to fulfill while your challenge kit is underway, let us know so we can do a partial fulfillment.

When your gearbox is complete, you will receive a tracking number or pick up ready notification.

*What will this work with?

This gearbox is designed to be installed in Tokyo Marui (TM) Spec Version 2, M4 type, AEGs. Please understand that while this gearbox is pre-upgraded and ready for installation, it is similar to being a challenge kit that may require some modification to be installed correctly. Improper installation or using anything outside our recommended compatible parts with this gearbox may cause inadequate performance and reduced lifetime.

*Note: After we assemble this gearbox kit, we test extensively for final quality assurance and we will send you a QC certificate with final testing results. Performance may vary upon barrel assembly, motor, externals and installation.

 

I already have this rifle/gearbox. Can I send it in to be upgraded like this?

Unfortunately, we do not accept custom work anymore. However this Gearbox is pre-assembled and tested by our technicians to make the installation process as easy as possible for Airsoft technicians experienced or new.

Is this available outside the United States?

Yes!

What is my warranty?

Given the nature of custom gearboxes, we are unable to facilitate any warranty coverage or returns for this product. However; our team is dedicated to provide expert and professional customer support and assistance for you should you encounter any issues during your installation/use of this build.

What is the performance tested with?

FPS: Tested with .2 Gram BBs at Ideal Hop.

RPS: Average RPS results from multiple 11.1v LiPo Batteries.

MS: Average single shot full cycle completion time from multiple 11.1v LiPo Batteries.

FT: Approximate effective range with HPA .32 Gram BBs.

See specific listings for further information on achievable performance.

Is there any servicing available?

This is Gearbox is considered like a challenge kit so you will be responsible for servicing and regular maintenance to maintain optimal performance.

Can I make a special request to change "X"?

No. We build all our Gearboxes with specific parts and modifications for the best value, performance, and long term reliability.

Is this "Drop-In Ready"?

Short answer is no, this will require time and knowledge to install your Gearbox perfectly like we do. Biggest thing you will need to do is ensure proper alignment when installing this in your rifle, even if you are using everything we have suggested you use your Gearbox with. Proper motor height and gearbox centering is crucial to ensure optimal performance. There is a risk of poor performance or even damage to the gearbox and internal parts if installed or used improperly.

One of the core goals of Umbrella Armory has always been to introduce teching in a more accessible and exciting way. We have an unending amount of enthusiasm doing what we do; building/upgrading Airsoft guns, and we know many Airsofters would love to do that themselves. With our gearboxes, any Airsofter regardless of technical expertise, will be able to install high performance in their rifle with a little bit of time and effort.

STATS

PERFORMANCE

This Gearbox combines Outdoor rated FPS and Overwhelming ROF. Ready to dominate on the field after installation.

STATS

Performance

This Gearbox combines Outdoor rated FPS and Overwhelming ROF. Ready to dominate on the field after installation.

400fps

Muzzle Velocity

.2g BBs hopped

45rps

Rate of Fire

Suppression capability

20ms

Trigger Response

Faster than you

225ft

Effective Range

.32g BBs

400fps

Muzzle Velocity

.2g BBs hopped

45rps

Rate of Fire

11.1v Lipo

22ms

Complete Cycle

7ms pre-cock

225ft

Effective Range

HPA .32g BBs

400fps

Velocity

.2g BBs hopped

45rps

Rate of Fire

11.1 V LiPo Battery

22ms

Complete Cycle time

7ms with pre-cock

225ft

Range

.32g HPA BBs

Designed for R-Hop. Accuracy and range are the single most deciding success factors in any engagement. Unlock the most of our build with our R-Hop Barrel Assembly.

Recommended

Torque and Speed. You will need a high quality motor to run this gearbox. In case you do not have the motor we recommend, pick one up with your gearbox.

Recommended

High Performance DIY

Ready out of the box, this gearbox is pre-assembled by our technicians with everything you need for a kick ass build. Installing our gearbox is the most effective and convenient method towards achieving high performance results with your AEG.

  • Curated Selection
  • Mission Specific
  • Pro-Tips

Cutting Edge Build List

Since the beginning, our team has researched and tested nearly every rifle, part, and modification on the market so we can offer our customers the highest quality available.

A Perfect Fit

With our selection of gearboxes, we are pursuing the goal of offering a high quality build for nearly every type of AEG on the market.

In-depth Guidance

Our team of experienced technicians have created a tutorial on installing this gearbox in your rifle. Explaining both the basic and expert level steps necessary for an easy and thorough installation, maintenance, and troubleshooting process.

Coming soon*

  • Curated Selection
  • Mission Specific
  • Pro-Tips

Curated Selection

Since the beginning, our team has researched and tested nearly every rifle, part, and modification on the market so we can offer our customers the highest quality available.

Mission Specific

With our selection of gearboxes, we are pursuing the goal of offering a high quality build for nearly every type of AEG on the market.

In-depth Guidance

Our team of experienced technicians have created a tutorial on installing this gearbox in your rifle. Explaining both the basic and expert level steps necessary for an easy and thorough installation, maintenance, and troubleshooting process.

Coming soon*

TECHNICAL SPECS.

The OCAW Gearbox

The same Gearbox build we use in our OCAW MK11D, this gearbox build is designed to outperform with the most advanced parts and modifications.

Compatibility*

Tokyo Mauri V2 Type AEGs*

ASG Boost 30k Motor

280mm-330mm Inner Barrel Length

R-Hop barrel assembly recommended

11.1v LiPo Batteries Deans

PTS EPG-C Motor Grip

*Using anything else than the above listed is not advised and could result in poor performance and damage.

Core Features

Complete pre-upgraded Retro Arms Gearbox

Lightweight and durable 7075 CNC Aluminum Gearbox shell

Siegetek precision DSG set

Umbrella 8mm Caged Bearings

GATE Titan V2 Advanced

Build List

Everything included with this Gearbox.

Retro Arms V2 8mm Gearbox QSC Shell AW EN7075 T651

The Retro Arms V2 Gearbox shell is the ultimate gearbox on the market.

Unparalleled strength. Unmatched lightness. This gearbox is the perfect ground stone for every high end custom build.

Gate TITAN V2 Advanced Rear Wired

The Titan V2 Advanced MOSFET from GATE.

Enhance your experience by shortening the trigger pull, allowing for faster follow up semi-automatic firing. The settings on the MOSFET furthermore allow for different technical features which our technicians adjust for you in the factory, including features such as trigger sensitivity, lowest active breaking for even better trigger response and durability.

Umbrella Piston + Piston Head Assembly (AOE + Spacer)

Umbrella modified and pre-assembled. SHS FMR Piston (Type 1); Lonex POM Piston Head.

This piston assembly is installed to deliver exceptional high speed performance and reliability. We test the Hardness of each piston rack before installation for absolute QC Assurance.

Umbrella Armory 8mm Caged Bearing Set

Our Caged bearing set has been used and abused in even the most high performance AEGs we have ever built.

We consider these one of the best options for any high end AEG platform. Tested by time and abused by our technicians. These bearings are our go to setup for all our builds. Expect them to last in even the most demanding setups, while offering a modest increase in rate of fire and lower motor heat.

Siegetek Concepts Generation 2 Cyclone Precision Airsoft AEG Gear Set (Type: V2/3 / 20.8:1 8-Tooth)