SKU: 58669174851

Starter SRS Upgrade Kit 2.0–2.5 Joule (Piston, Cylinder, Spring)

Sale price$121.95 Regular price$135.50
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Ships within 48 hours · Estimated delivery Aug 8 - Aug 13

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Description

Starter SRS Upgrade Kit 2.0–2.5 Joule (Piston, Cylinder, Spring)The Starter package for your Silverback SRS. This upgrade kit makes your SRS consistent and silent! The package includes the following Stalker upgrades! The package includes the following Stalker upgrades. Stalker SRS Scorpion Ultimate Edition Stalker SRS Fluted Teflon Cylinder Stalker Official Logo Patch We strongly believe that the Rapax springs are the best springs on the market. The results with this spring and the Stalker upgrades are perfect.

The Starter package for your Silverback SRS. This upgrade kit makes your SRS consistent and silent! The package includes the following Stalker upgrades!

The package includes the following Stalker upgrades.

We strongly believe that the Rapax springs are the best springs on the market. The results with this spring and the Stalker upgrades are perfect.

*Note: This upgrade discount is only available when all products are in stock. Click 'Add to cart'; if all products are visible, you are able to purchase this kit with the mentioned discount. If the products are not in your shopping cart, you will see a blank page, meaning one of these products is not available.

Product Description:

SRS Scorpion Piston

The Stalker Scorpion piston features an extremely modular design that was created from scratch on my drawing table a long time ago. It includes all the options players could want for their SRS piston. It is a unique concept where six weights form the body itself. As the piston is made up of these weights, it is also possible to extend the piston with additional weights (short stroke), which in turn reduces the volume of your cylinder and joule output.

Fluted Teflon Cylinder

This cylinder is a Teflon fluted version of a standard cylinder and makes your SRS A1 or A2 look outstanding. The inner coating treatment is a cold process, so the cylinder retains its straight shape, which is often not the case with heat-treated cylinders. Your SRS not only gets an aesthetic upgrade, but the cylinder also features a special inner coating that provides better energy transfer with pistons and may increase your joule output if your piston has a correctly sized cup.

  • This cylinder is fully compatible with both Silverback SRS A1 and A2 receivers.
  • This cylinder thread works with both the A1 and A2 bolt handles.
  • This cylinder works with aftermarket pistons.

Rapax 2J+ RMS Spring

The Rapax Modular Spring (RMS) series is manufactured to the same quality standards as the Light Pull series springs. Built for durability and performance, they are designed to provide the best sniper experience. Compared to the Light Pull series, RMS springs are considerably shorter, have a slightly heavier pull, and offer quieter shots. Additionally, RMS springs are electrically coated to prevent rust, ensuring smoother operation on the spring guide.

If you have any issues or questions about this or other Stalker products, please visit our Stalker Owners Group on Facebook here: https://www.facebook.com/groups/329589544772075/

You can follow all my live feeds, photos, and updates on my Instagram, Facebook, or YouTube channels here:

Facebook: https://www.facebook.com/StalkerAirsoftDesigns/
Instagram: https://www.instagram.com/stalkerairsoftdesigns/
YouTube: https://www.youtube.com/channel/UCWsBiSHlu-lbcnGQWAkeJWQ

For more information about Stalker products, tech & crafting guides, please visit: www.stalkerairsoft.com

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 58669174851

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James E Morris
Cuba, US
★★★★★ 5
Not expensive
Gets the job done
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 27, 2026
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steven f
Battle Creek, US
★★★★★ 1
Initially defective poor quality
This item was initially defective and I needed one so I ordered another thinking it was a fluke. Both devices would not turn on. The second one briefly turned on for about 30 seconds and died. The major inconveniences that I can't return it in the normal way. I have to bring it to UPS and there isn't one near my house. I am very disappointed with this item and also with the return policy
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Reviewed in the United States on June 8, 2026
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Verified Purchase
JudeBlack
Omaha, US
★★★★★ 5
Came in skeptical, but it's GREAT!
I read all the bad reviews I could on this thing and considered it an acceptable risk considering the price. Assembly was easy and the instructions were fair. Not amazing, but once you handle the edger, the gist is clear. I was skeptical overall that the horsepower and plastic guard weren't going to be enough. I ran it for nearly 45min stopping every 5 or so to check the blade and guard. It stayed tight and I was able to manually turn the blade to make sure it was working right. My front yard and sidewalk have been neglected for a few years. I would sometimes edge it out with the weed Wacker, but couldn't get it as clean as I wanted without breaking a LOT of line. When I was done, I noticed the guard had a lot of soil and grass buildup that I was able to take out easily with my fingers. There were a few times I scraped the sidewalk edge, but the blade is still solid and ready for more! I was surprised at the quality and as you're going over an area, it feels solid and not squirly or out of control. My uses are going to be mostly suburban maintenance on my own yard. If I had more land or something bigger, I would consider something larger. For my yard and purposes, this edger is going to work just fine! Did not notice any issues with the blade getting loose, but stayed aware of it. There is a lock nut that keeps it in place. I imagine over time and switching blades, this is going to lose its locking function, but I already see amazon has replacement blades that come with new lock nuts!
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Reviewed in the United States on May 5, 2025
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Verified Purchase
Sherid94
Charlottesville, US
★★★★★ 5
Works great, easy assembly and no issues!
Using the weedeater for edging was too hard, so I purchased this. It works great! It was easy to assemble and easy to use. My lines are perfect, but the size, durability, and power of this gem get the job done, and it's lightweight enough that I can easily maneuver it around the yard. I chose a corded one so I don't have to deal with battery life or charging.
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Reviewed in the United States on September 26, 2025
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Antonio Conte
Chelsea, US
★★★★★ 5
Excellent Kindle for reading every day
I’m very happy with this Kindle Paperwhite. The screen is easy on the eyes, even for long reading sessions, and the front light makes it comfortable to read day or night. It’s lightweight, the battery lasts a long time, and it’s super convenient to carry around with a whole library. Great purchase overall.
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Reviewed in the United States on December 23, 2025

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