- Upgrade Kit
- Trigger Box Included
- Upgrade Piston Included
A kit to upgrade Tokyo Marui Base / CYMA / JG VSR / BAR-10 Rifles, and Well MB-03 Sniper Rifles. The kit comprises of two parts: A replacement Trigger Mechanism Box, and an Upgrade Piston, which compliment each other perfectly.
Here at Patrol Base we ship all around world, with delivery not only to the UK, but to most of the EU and select Worldwide locations as well. We provide a working day by road service via our handpicked courier services, simply buy your Airsoft guns with us and we'll have them delivered directly to your door.
For more information and to see the country we deliver please check out our Delivery Information Page.
Below are some rough postage prices for orders. Please note these are subject to change, and are only a rough guide. For more accurate postage estimate please use the Postage Calculator at the basket.
UK Next Day
Highlands / Islands
* Please note that Scottish Highlands, Islands and EU post prices can vary wildly. Prices range from £8.99, up to £29.99, so please ensure you refer to the Postage Calculator at the basket for the lowest possible price.
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.
The Trigger Set is constructed from High Quality and Durable Steel, and the Piston is constructed from CNC Machined Aluminium with Polymer Guide Rings, and Rubber O-Rings. The Trigger Box is a One piece Trigger System, which is designed to have an extremely short trigger pull, also know as a zero trigger, for more accurate and immediate shots. Internally the trigger box features Roller Bearings to prevent wear, and Steel Sears to take the stress of high powered Springs for High FPS builds. The Piston is constructed using a CNC Process making it durable and precise, and is ported to reduce its weight. The front of the piston features a rubber o-ring to cushion the impact with the front of the cylinder to reduce noise and wear. The piston also features polymer guide rings to prevent wobble as it moves up and down the cylinder. Your rifle may require slight modifications, such as to the trigger guard, or to the Piston Guide Rings depending on your Rifle / Cylinder Setup. For more help or fitting instructions please see the Special Instructions at the bottom of the page. This upgrade set is perfect for those who are looking to upgrade their VSR / BAR-10 Sniper rifle, or for those who simply like to tinker with their rifle until it is perfect
- For Tokyo Marui Base / CYMA / JG VSR / BAR-10, and Well MB-03
- Durable Alloy Trigger Set and Piston
- One piece Trigger System
- For High FPS / String Spring Custom Builds
- Sensitive / Zero Trigger
- Roller Bearing on Trigger to prevent wear
- 90 Degree Trigger Sear / Piston Setup
- Steel Sears
- CNC Machined Piston
- Piston Front O-Ring to reduce noise and reduce wear
- Plastic Piston Guide Rings to reduce movement
- Ported Piston for Weight Reduction
- VSR / VSR-10 Specialised S-Trigger Set
Your rifle may require slight modifications, such as to the trigger guard, or to the Piston Guide Rings depending on your Rifle / Cylinder Setup. For more help or fitting instructions please feel free to call the Workshop on: 01484 644709, or email: firstname.lastname@example.org.
Weight and Dimension
CNC Machined Aluminium / Polymer
Internal Part Construction
Part for Power Source Type
VSR / Bar10
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!
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.