SKU: 41472728182

Upgrade for SRS 16" (2.8 Joules)

Sale price$191.30 Regular price$212.56
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Ships within 48 hours · Estimated delivery Jul 19 - Jul 24

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

Upgrade for SRS 16" (2.8 Joules)The Upgrade kit turns your SRS into a sniper beast. This UPGRADE makes your SRS precise, consistent, and quiet! Load your magazines and dominate the field like never before. The package includes the following upgrades: Kraken SRS Ultimate Edition STALKER Scorpion Piston SRS (Ultimate Edition) "Morpheus" Dual Bore Hybrid Barrel (420mm) Kraken SRS Concave Bucking 70 (Gen 2) Teflon Lightweight Cylinder For SRS A1 A2 STALKER Official Logo Patch Carbon

The Upgrade kit turns your SRS into a sniper beast. This UPGRADE makes your SRS precise, consistent, and quiet! Load your magazines and dominate the field like never before.

The package includes the following upgrades:

We firmly believe that Rapax Springs are the best springs on the market. The results with these spring upgrades and Stalker components are outstanding.

*Note: this upgrade discount is only available when all products are in stock. Click "add to cart"—if all products are visible, you can purchase this kit with the mentioned discount. If the products do not appear in your shopping cart, you will see a blank page, which means one of these products is not available.

Product Descriptions:

Kraken Hop-Up Chamber

  • Easy setup for both professional and new players (Bucking change in ~2 minutes)
  • 100% self-alignment system for a perfectly aligned setup every time
  • 100% aligned and sealed with Kraken hop-up buckings.
  • Toothed adjustment wheel for easy tuning.
  • O-ring guided adjustment wheel.
  • Custom-made steel cam screw.
  • White laser-engraved letters and text.
  • Front O-ring to prevent BB drop.
  • Modular chamber design to fit most VSR-cut buckings, bridged and unbridged inner barrels, and nubs.
  • Modular cam section to interchange and use S1, S2, and S3 cams.
  • V-slot for the upper outer barrel screw of the SRS A1.
  • V-slot for the lower outer barrel screw of the SRS A2.
  • Side cut-outs on the body for future STALKER products.
  • Quick setup for easy inner barrel swaps, hop-up bucking changes, or inner barrel cleaning.

Scorpion Piston SRS

The Stalker Scorpion piston features an extremely modular design that was developed from scratch at my drawing table a long time ago. It includes every option users could want for their SRS piston. It is a unique concept where 6 weights form the body itself. Since the piston is built from these weights, it can also be extended with additional weights (short-stroke setup), which in turn reduces cylinder volume and joule output.

Morpheus 420MM Inner Barrel

The Morpheus Hybrid barrel is made from highly durable SUS304 stainless steel and features a conical crown (Dualbore) to improve range and accuracy.

We use the most durable and resistant seamless SUS304 steel because we wanted to raise the standard. Most brands use SUS303 steel because it is easier to machine. The corrosion resistance of SUS303 stainless steel is reduced due to its composition, as it is optimized for machining. The SUS304 steel we use is harder to machine but more durable and offers excellent corrosion resistance.

Teflon Cylinder

This cylinder is a Teflon-coated version of a standard cylinder. The interior coating treatment is a cold process, allowing the cylinder to retain its straight shape, which is often not the case with heat-treated cylinders. The cylinder also features a special internal coating that provides better energy transfer with pistons, which may also increase your joule output if your piston has a properly sized cup.

This cylinder is fully compatible with Silverback SRS A1 and A2 receivers.

This cylinder thread works with both A1 and A2 bolt handles.

This cylinder is compatible with various aftermarket pistons.

Rapax 2.8J

Galvanized to prevent rust, reduce friction, and provide extended service life compared to other springs.

*The box is for promotional purposes only and is not included*

You can follow all live feeds, photos, and information on Instagram, Facebook, or via our email 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: 41472728182

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A
Verified Purchase
Amazon Customer
New York, US
★★★★★ 5
Thanks Jeeves!
Size: 11, Color: Raven/Quiet Shade/Ivory
They look and fit very nice! Perfect for around the mansion or the yacht club lol.
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Reviewed in the United States on March 25, 2026
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Honest Opinion
Omaha, US
★★★★★ 4
Poor footbed but otherwise good.
Size: 10, Color: British Tan/Dark Chocolate/Natural
Comfortable. Replaced mediocre footbed that has no arch support with something else and it is now great. True to size.
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Reviewed in the United States on April 16, 2026
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AFRugger
Dallas, US
★★★★★ 5
A notebook that stands up extremely well to bad weather and harsh working conditions
Color: Tan, Size: 1 Pack
Now that I've used this notebook, I can't see myself using any other kind. I travel a lot and need a notebook with me at all times. That means the notebook I have with me is going to get wet frequently and take a beating in my pocket. This notebook is perfect. Rain/sweat have no effect on my written notes or my ability to write. The pages are thick which prevents tearing. The cover and binding are quite sturdy, rather than getting bent like cheaper notebooks. At 4x6 inches this fits in my cargo pocket without a problem and gives me plenty of writing space. If you are going to carry the notebook in your front pocket I'd suggest the smaller 3x5 version. The ruler on the back page was not something I thought about but has come in handy several times. No, this is certainly not the cheapest notebook available, but it is a reasonable price for a high quality product. If you are using this for field work, it is probably worth the cost. My work notes are certainly more valuable to me than the couple extra bucks spent. And really, how often do you fill up a notebook? I only go through one every month or two so it's not very costly. You cannot use gel type pens with this notebook, only normal ballpoint pens or pencils. I suggest using a Fisher Space Pen, it works very well with this notebook (also available on Amazon Prime for under $10)
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Reviewed in the United States on May 31, 2016
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MWC
San Leandro, US
★★★★★ 5
Wet proof is great
Color: Blue, Size: 6 Pack
As a nurse, I am able to put this in my scrub pocket and make notes as I go along. I also write down my patients' meds so I can refer to it when the computer is not available or not with me. Since it is wet proof I can sanitize it when (and not if) it gets something on it. I use a ballpoint pen and have used a pencil and none of my writing gets smeared or erased by the disinfectant wipes. Since I have these books stored securely in my locker if something comes up in the future with someone I can refer back to them for answers not found in the chart. I use my book when I am giving shift report which is very helpful when I have to tell the know-it-all nurse every little detail because she wants to eat breakfast instead of reading orders and notes. Some of my coworkers have also ordered their own books. A great product and very durable.
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Reviewed in the United States on June 30, 2020
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Ernesto Luna
Los Angeles, US
★★★★★ 5
Great product
Color: Black, Size: 3 Pack
Great for taking notes. Write anywhere
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Reviewed in the United States on January 17, 2026

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