- Complete HPA engine
- Semi/full auto version
- For V2 gearbox equipped M4/AR-15 AEGs
If you're looking for the cheapest and easiest way to convert your M4/AR-15 AEG to HPA, you just found it! The Ares Drop-in HPA Engine Conversion Set for M4/AR-15 V2 Gearbox is a complete set with a V2 gearbox shell, HPA engine and EFCS module all pre-built, saving you hassle sourcing the right parts while saving you a few quid as a bonus!
This HPA Engine Gearbox is designed as a drop-in replacement for standard M4/AR-15 AEG Version 2 gearboxes but it may need alignment and tuning to fit certain receivers and HOP-up units. To power the pre-installed EFCS, an 11.1V LiPo battery with an XT30 battery connector is required and the air line fitting is US spec, meaning it will only accept US-type air lines and won't work with EU-type lines. For those as yet uninitiated future HPA players; this set does not include an air line, regulator or air bottle and you will need these to get into the HPA game!
This is the semi/full auto version designed for non-ambidextrous M4/AR-15 AEG receivers and is equipped with a standard M4/AR-15 curved trigger, ideal for almost any build style. As with any internal upgrade, this engine will require expertise to install and some level of familiarity with M4/AR-15 AEG internals. If you're struggling, you can contact us or your local Airsoft tech for advice.
Fast Delivery
Delivery & Postage
Here at Patrol Base, we send all our packages from our Warehouse based in the UK with the exception of European Warehouse Items. All of our parcels are sent with specially picked couriers to ensure your parcels get to you on time and in one piece.
For more information please check out our Delivery Information Page.
Estimates
Below are some rough postage prices for orders. Please note these are subject to change and are only a rough guide. For a more accurate postage estimate please use the Postage Calculator at the basket.
UK Standard
£6.95
From
UK 24hr Dispatch
£8.95
From
Highlands / Islands
£24.99*
From
* Please note that Scottish Highlands, and Islands postage prices can vary wildly. Please refer to the Postage Calculator at the basket for the lowest possible price.
Returns
We want you to be absolutely happy with our products and services, so we provide the simple Patrol Base guarantee: if on receiving your item you are unhappy with your item for any reason then simply send it back to us. We will replace or refund the item.
You can return any item for any reason whatsoever, even if you have just changed your mind, within 14 days of receipt of the order. This is in addition to your rights under the Consumer Protection (Distance Selling) Regulations 2000.
For more information on returning products, and how to do it please visit our Returns Policy Page.
Description
Features
- Complete HPA engine - Add your air line, regulator and bottle to get busy!
- Semi/full auto version - For non-ambidextrous fire selectors
- US Type air hose fitting - Only compatible with US-type airlines
- EFCS pre-installed - Requires an 11.1V LiPo battery with XT30 Connector (not included)
- Velocity dependent on input pressure - Maximum pressure: 12 BAR/174 PSI
- Compatible with CYMA CM.5xx M4/AR-15 polymer receivers
- Delta Armory, Specna Arms & Lancer Tactical M4/AR-15 AEGs may require alignment, tuning and modification
- For V2 gearbox equipped M4/AR-15 AEGs - Fitting and alignment may be required
Package Includes
- Ares Drop-in HPA Engine Conversion Set for M4/AR-15 V2 Gearbox
Special Instructions
This HPA Engine Conversion Set requires some level of knowledge and technical skill to install. Please consider this carefully before making your purchase.
The pre-installed air line connector is specifically for US-type air lines and will not work with EU-type air lines.
Once the Engine is installed, muzzle energy/FPS is dependent on the input pressure from your air rig.
The absolute maximum input pressure this HPA Engine is rated for is 174 PSI/12 BAR. Do not exceed this under any circumstances.
Use of this HPA Engine in any of our M4/AR-15 AEGs constitutes a modification and is not covered by the 12-month warranty of the AEG.
The HPA Engine itself is covered by its warranty for manufacturer faults but this does not include leaks or user error arising from improper installation. Leaks are not covered due to the input pressure being user-configurable. If you're unsure how to install this engine, contact us and we will endeavour to assist.
Specification
General
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Parts & Accessories Type
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Electric Internal Parts, Internal Parts,
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|---|---|
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Internal Part Type
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Complete Gearbox, Complete HPA Engine Conversion for V2 Gearbox,
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 Custom Parts
Use of HPA is considered a "modification" and is not covered by your warranty.
This HPA Engine is equipped with a US type HPA connector and will require a US type Air Line. It will not work with EU type fittings.
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Weight and Dimension
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Approx. 0.449kg
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Construction
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Black
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|---|---|
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Alloy shell. Polymer nozzle.
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Internal Part Construction
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Polymer, Alloy, Steel, Aluminium,
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Part Specific
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Part for Power Source Type
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Electric
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|---|---|
 |
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Package Includes
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Complete HPA Engine Conversion for V2 Gearbox
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Electric Part Specific
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V2 Gearbox
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|---|---|
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Gearbox Version Compatibility Variant
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Version 2
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Size guide
Parts Fitting
Upgrades and Downgrades should only be undertaken by experienced players, or Airsoft Technicians. Please note, changing any internal parts of a weapon voids its warranty unless done in-house by our staff.
Please ensure that when fitting parts the part purchased is the correct part, as once a part has been fitted we cannot accept return.
We do know that players love to tinker, so we're here to give you help should you require it, and if needed you can get in touch with our workshop for more help!
Unique Parts
Please note that some parts may be unique to a specific brand of weapon. For example: Parts for an ASG M4A1 may not fit an ICS M4A1.
Parts from the same brand typically have a high chance of fitting, though be warned, some replicas use unique parts, so please ensure the part will fit before you attempt to fit it.
If you require help with fitting any parts feel free to get in touch with us via our Contact Us Page.
For more information with fitting parts, or should you require help, feel free to get in touch with our Workshop Department via our Contact Us Page.
Terms and Conditions relating to parts fitting can be read on our Terms and Conditions Page.