- Complete gearbox
- MOSFET included
- For KRYTAC Trident & REC7 AEGs
If your veteran KRYTAC build is sounding a bit tired, the KRYTAC Nautilus Complete Version 2 Gearbox will revamp it! A complete gearbox assembly supplied directly from KRYTAC, this original replacement parts set is practically a drop-in fit, pre-assembled and pre-wired to a Deans battery connector and Female Spade connectors for your motor.
The included spring is an M120, which should provide around 393 FPS on 0.20g BBs when installed in a KRYTAC M4/AR-15 AEG. This will exceed most sites' skirmish limits, so we recommend swapping the spring out for a Bolster Armouries M105 or an equivalent M95, M100 or M105 AEG spring. Thankfully, this will be easy and can be done in seconds, thanks to the quick-change spring system.
The KRYTAC in-line MOSFET is also pre-wired, meaning you won't need to break out the soldering iron to complete your build. While it is based on the V2 design, the Nautilus gearbox shell and ambidextrous fire selector mech are only compatible with KRYTAC AEG receivers, either REC7, Trident or Trident LMG.
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 3-5 day Standard
£6.95
From
1-2 Working Day Dispatch UK mainland
£9.95
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 gearbox - Pre-built & ready to install
- MOSFET included - Pre-wired to a Deans connector
- Components:
- Reinforced alloy shell
- 18:1 Steel gears
- Ported polymer piston with 4 steel teeth
- Rubber piston pad
- Steel cylinder
- Steel ball-bearing spring guide
- 8mm Ball-bearing bushings
- Polymer compression components
- In-line MOSFET
- Flat trigger
- Mock bolt
- For KRYTAC Trident, Trident LMG & REC7 AEGs - NOT for other M4/AR-15 receivers
- Motor NOT included - If you need to replace yours, you'll need a Long Shaft Motor
- Recommended Spring for ≈350 FPS: Bolster Armouries M105 Premium Upgrade Spring
Package Includes
- KRYTAC Nautilus Complete Version 2 Gearbox
Specification
General
Parts & Accessories Type | Electric Internal Parts |
|---|---|
Internal Part Type | Complete Gearbox |
 | Custom Parts |
Construction
 | Black, Silver, |
|---|---|
 | Alloy shell. Steel gears & bushings. Steel Spring Guide. Polymer compression parts. |
Internal Part Construction | Polymer, Alloy, Steel, |
Part Specific
Compatible Power Source Type | Electric |
|---|---|
Package Includes | Complete Gearbox |
Electric Part Specific
 | V2Gearbox |
|---|---|
Gearbox Version Compatibility Variant | Version 2 |
Spring Specific
Spring Manafacturer Power Rating | Approx. M-120 |
|---|---|
Spring Approximate M/S | Approx.120m/s, using 0.20g BB |
Spring Approximate FPS | Approx.393.7fps, using 0.20g BB |
Bearing Specific
Spring Guide Bearings | Yes |
|---|
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.