Product code: 5377
  • 90 Degree Sear
  • Amazing Value Set
  • CNC With Anodised Finish

This 90 degree trigger and piston set is a must have combination for any Airsoft sniper using a Tokyo Marui based or clone VSR / Bar-10 bolt action sniper compatible platform.

Full description


A 90 degree setup results in unreal strength for some incredibly strong spring choices. The trigger release is also unlike any other build. The whole unit is built to last, very rarely do you need to service this unit, as it is a close box unit dust and debris is unlikely to find its way in. The piston can also be broken down for a proper deep clean. The piston head also has a reasonably thick sorbathene pad to absorb some sound and impact. This trigger set is amazing for the value and would be an amazing addition to any compatible sniper set up offering a very positive locking sear and great trigger pull


  • Very lightweight
  • Incredibly durable
  • Ventilated piston head
  • Sorbathene padded head
  • Oring Front Seal
  • 7mm diameter spring guide with 9mm adapter sleeve
  • Piston takes up to 13mm wide springs
  • Improve your FPS and consistency
  • 90 degree catch for incredibly strength and trigger release
  • Single stage trigger
  • None-adjustable trigger pull due to its incredible pre-setup
  • Compatibility: TM / CYMA / JG and other VSR/Bar-10 clones
  • Piston Dimensions:
    • Length: 104mm
    • Width: 21.75mm
    • Silver pickup length: 11.75mm
    • Silver pickup inner DIA: 13.45mm
    • Trigger Set Dimensions:
      • Length: 109.90mm
      • Width: 18.6mm
      • Height Inc trigger: 63.82mm 

      Package Includes:

      • VSR CNC Trigger Set 'EZ Zero Trigger' Kit Gen.4 - Black
      • VSR CNC piston - Blue
      • 7mm spring guide & 9mm sleeve adapter
      • 2x Trigger assembly fitting bolts
      • Spring guide stopper



      Internal Part Type
      Trigger Box
      Patrol Base - Warning Icon
      Upgrade Parts

      Weight and Dimension

      Weight KG Icon
      Weight (KG)
      Approx. 0.8kg
      Product Height
      Approx. 63.82cm
      Product Length
      Approx. 10.4cm
      Product Width
      Approx. 21.75cm


      Colour Wheel Greyscale
      Item Colour
      Construction Icon
      CNC Machined Steel
      Internal Part Construction

      Part Specific

      Part for Power Source Type
      Weapon Platform
      VSR / Bar10
      Package Includes
      • Spring Guide
      • Screws
      • Piston
      • Complete Trigger Set

      Delivery & returns

      Postage Estimates

      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 Standard



      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.


      For more detailed information please see our Delivery Information.

      We are proud of our rapid delivery which, comprises of Royal Mail 1nd class recorded and courrier next working day to mainland UK. We also ship to EU countries; Scottish Highlands and Islands which are a minimum of a two day service and are shipped by land / sea. Our deliveries are made by DPD and Royal Mail recorded 1st or 2nd class signed for, and Royal Mail Standard.

      We deliver from Monday to Friday, and Saturday with a special service. If more than 7 days have passed since we confirmed dispatch and your order has not arrived, then please call our Customer Care team on 01484 644709. If we don’t have stock of an item then we will call and email you letting you know that it is out of stock, and we will send it to you as soon as stock becomes available. If you want to cancel any item/s that are out of stock once order you can. For most UK deliveries postage & packing is based upon the value, size and weight of your order.

      We always look to fulfil every order in full on time, but on the odd occasion an  item is missing we will attempt to contact you prior to shipping. If your order is a Next Day service, and we cannot contact you, we will refund the missing item(s), and ship the rest of the order immediately.

      Upon signing for the delivery you are accepting the correct delivery for your items, however, we do understand that you might not be able to open your package straight away so you have up to 48 Hours to advise us of missing / incorrect items.

      Please note we do not compensate in any way for time spent waiting in for deliveries that do not arrive, we do however accept that in life, mistakes and circumstances happen that can unfortunately mean that your item may not be delivered next day as requested e.g. bad weather, computer error etc. If such mistakes do occur we will refund your postage charge in full and by agreeing to the previous sentence and proceeding with the order you accept that we have done everything we can to help you obtain the package.

      For orders outside of the UK Mainland please specify your location when calculating postage. 

      For all international orders there may be an additional postage charge on top of that quoted. You will be contacted if this applies for your order. If the postage costs are too high, you may cancel your order at any time prior to dispatch.

      Courier Specific Information


      You will receive tracking information when your order has been processed for shipping.

      Please note that UPS will make one delivery attempt to deliver your parcel.

      If no one is available to receive the package at the address, then at the drivers discretion, the parcel will either be re-scheduled for the next working day or sent to a UPS Access Point.

      If the parcel is too large to be left at a UPS Access Point (eg a package containing a large plate carrier or replica) then it will be returned to the sender, in this case us, Patrol Base Ltd.

      It is the customers responsibility to check tracking, and if a parcel is taken to an access point it will need to be collected within 10 days.

      Further delivery attempts may incur additional delivery costs.


      You will receive tracking information when your order has been processed for shipping.

      Please note that DPD will make up to two delivery attempt to deliver your parcel.

      After the first attempt the parcel will be taken back to their depot and attempted the next day, if after this the parcel is not delivered it will be returned to the sender, in this case us, Patrol Base Ltd.

      Further delivery attempts may incur additional delivery costs.


      For more detailed information please see our Returns Policy Page.

      You can cancel any order that has not been dispatched. Please call our Customer Care team on 01484 644709 between 9:30am and 5:00pm or log onto the website and check the status of your order in your account.

      If you do want to arrange the return of an item, simply call our friendly Customer Care team on 01484 644709 from 9:30am to 5:00pm and they will explain how to return the items.

      Alternatively you can get in touch with us via our Contact Us Page.

      If you are returning a product because it is faulty or something is wrong then we will pay for it to be returned to us. The Customer Care Team will arrange for cost you incur to be refunded.

      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.

      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.

      This guarantee ensures that if you are unsure about what you are purchasing you have the peace of mind of knowing that we are here to help. In addition, if you decide that you made a mistake or you change your mind then please send the goods back within 14 days of receipt. Sadly, this can only apply to standard range products; we cannot accept back any item that has been made to order i.e. Two Tone Airsoft equipment.

      Upon signing for the delivery you are accepting the correct delivery for your items, however, we do understand that you might not be able to open your package straight away so you have up to 48 Hours to advise us of missing / incorrect items.
      If you do decide to return anything for whatever reason then please get in touch with us via our Contact Us Page for a copy of our returns form.

      If you do send goods back for any reason other than a fault you will normally be asked to pay the carriage charges, we would just have to recover the costs in our prices. We would rather be completely straight with you, keep our prices as low as possible, and just ask you to pay if you choose to return anything.

      Any none faulty return must be shipped back in full re-saleable order with original undamaged packaging.

      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.

      Finance options

      Looking to buy an Airsoft replica, but don't want to drop all your money at once? Perhaps you want to spread your payments over time to keep a backup of money, or perhaps you simply can't afford the hit right now and want to spread it over time? In any case you can spread your payments to take away the pain of the initial hit of the purchase of a replica, or give yourself the ability to spend that little bit more and get that rifle you've always wanted!

      Want to know more about Airsoft Interest Free Finance?
      You can check out our Airsoft Finance Info Page for more details >

      Here at Patrol Base we have partnered with Omni Capital Retail Finance, allowing you to buy now pay later with ease.

      You can select finance during the payment process which will take you to the Omnicapital portal and allow you to complete a credit check at your leisure. Once your finance is accepted you will be able to complete your order and wait for the goods to arrive!

      Wondering how much it's going to cost?
      Check out the examples below.

      Looking to make the jump from BB guns to Airsoft, but don't want to save up to buy your entire loadout? Your time has come!

      Airsoft replicas are leaps and bounds ahead of BB guns, but can sometimes carry a heavy price tag. You can spread the cost with us to save the strain on your wallet to allow you to buy your entire loadout at once, rather than piece by piece. Play now, pay later.

      Want to know exactly why Airsoft Replica are so much better than BB Guns? Check out our BB Guns Page.

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