SKU: 15719979411

Ultimate SRS Upgrade Kit (420mm Barrel 2.0-2.5 Joule)

Sale price$158.82 Regular price$176.47
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Ships within 48 hours · Estimated delivery Jul 18 - Jul 23

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Description

Ultimate SRS Upgrade Kit (420mm Barrel 2.0-2.5 Joule)The Ultimate Stalker Upgrade Kit to make your Silverback SRS a true sniper beast. This upgrade kit makes your SRS accurate, consistent, and silent! Load up your magazines and dominate the field like never before. The package includes the following Stalker upgrades: Stalker SRS Kraken Hop Up Chamber Ultimate Edition Stalker SRS Scorpion Piston Ultimate Edition Stalker Morpheus 420mm Inner Barrel Stalker SRS Fluted Teflon Cylinder We strongly believe

The Ultimate Stalker Upgrade Kit to make your Silverback SRS a true sniper beast. This upgrade kit makes your SRS accurate, consistent, and silent! Load up your magazines and dominate the field like never before.

The package includes the following Stalker upgrades:

We strongly believe that Rapax springs are the best springs on the market. The results achieved with these springs and the Stalker upgrades 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 are not visible in your shopping cart and you see a blank page, it means one of these products is not available.

Product Descriptions:

Kraken Hop-Up Chamber

  • Easy setup for both experienced and new players (~2-minute bucking swap)
  • 100% self-alignment system for a perfectly straight setup
  • 100% straight / 100% seal patented Kraken bucking
  • Adjustment wheel head cut-out for easy tuning
  • O-ring guided adjustment wheel
  • Custom-made steel hop arm screw
  • Laser-engraved white letters and text
  • Front O-ring to prevent BBs from falling into the receiver
  • Modular chamber design compatible with most VSR buckings, bridged/unbridged barrels, and nubs
  • Modular arm section to swap and use S1, S2, and S3 arms
  • V-groove island for upper outer barrel screw (SRS A1)
  • V-groove for lower outer barrel screw (SRS A2)
  • Side flat body cutouts for future Stalker products
  • Fast setup for easy inner barrel or bucking changes and barrel cleaning

SRS Scorpion Piston

The Stalker Scorpion piston features an extremely modular design developed from scratch. It offers all the options players could want for their SRS piston. It is a unique concept where six weights form the piston body itself. Since the piston is built from these weights, it can also be extended with additional weights (short stroke), reducing cylinder volume and joule output accordingly.

Morpheus 420mm Inner Barrel

The Morpheus Hybrid Barrel is made from highly durable SUS304 stainless steel and features a Dualbore tapered end-crowning to enhance range and accuracy.

We chose stronger, more durable seamless SUS304 steel to raise the standard. Most brands use SUS303 seamed steel because it is easier to machine. However, SUS303 stainless steel has reduced corrosion resistance due to its composition optimized for machinability. SUS304 is harder to machine but offers superior durability and excellent corrosion resistance.

Fluted Teflon Cylinder

This cylinder is a fluted Teflon version of a standard cylinder and gives your SRS A1 or A2 an aggressive look. The inner coating is applied using a cold treatment process, ensuring the cylinder maintains its straight shape—unlike many heat-treated cylinders. Besides improved aesthetics, the special inner coating enhances energy transfer with the piston, which may increase joule output if your piston has the correct cup size.

  • Fully compatible with Silverback SRS A1 and A2 receivers
  • Thread compatible with both A1 and A2 bolt handles
  • Compatible with aftermarket pistons

Rapax 2J+ RMS Spring

The Rapax Modular Spring (RMS) series is manufactured to the same high-quality standards as the Light Pull series. Designed for durability and performance, it delivers an excellent sniper experience. Compared to the Light Pull series, RMS springs are significantly shorter, require slightly more force to pull, and provide quieter shots. Additionally, RMS springs are electrically coated to prevent rust and ensure 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 live feeds, photos, and updates on Instagram, Facebook, or YouTube:

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, and 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: 15719979411

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4.9 ★★★★★
Based on 28 reviews
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M
Verified Purchase
Martha Feliz
West Palm Beach, US
★★★★★ 5
Big tray
Color: Black, Size: Medium (8.5-14''W x 12''D)
Nice and big cutlery fit goog
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 29, 2026
O
Verified Purchase
Old Cactus
New York, US
★★★★★ 4
Expandable helps
Color: Black, Size: Medium (8.5-14''W x 12''D)
Because the tray is expandable from both sides it fits my drawer nicely.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 8, 2026
L
Verified Purchase
LORI
Alexandria, US
★★★★★ 5
Works really well and it actually holds a lot
Color: Black, Size: Medium (8.5-14''W x 12''D), Color: Black, Size: Medium (8.5-14''W x 12''D)
Great product I love that you can put it extended open or or not depending on the width of your silverware drawer on your kitchen or you can use it for tools. You can use it for nuts and bolts. You can use it for I don’t know paintbrushes if you want to. I don’t know if you really want to. I have one in my kitchen and I have one in my living room in my bedroom just to put pens and stuff like that in them. If you have a wide silverware cabinet drawers, you can extend it a lot more than what you see in my picture, but I was able to extend it way more than what was there before and I really like how it is.
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Reviewed in the United States on May 26, 2026
J
Verified Purchase
J
Lowell, US
★★★★★ 5
Exactly as expected
Color: Black, Size: Medium (8.5-14''W x 12''D), Color: Black, Size: Medium (8.5-14''W x 12''D)
This expandable silverware organizer made such a difference in my kitchen drawers. It sounds dramatic for a utensil organizer, but it genuinely made everything feel cleaner, more organized, and less chaotic. I love that it expands because it made it super easy to customize to my drawer size instead of awkwardly leaving unused space. The compartments are roomy enough to hold a lot without everything getting jumbled together, and I like that there are enough sections for silverware plus extra kitchen tools and gadgets. It helped me finally give everything a designated place, which is especially satisfying when setting up a new kitchen. Even though it’s plastic, it doesn’t feel flimsy or cheap. It feels sturdy once in the drawer, slides open smoothly, and has held up really well with daily use. I also appreciate that it’s lightweight and easy to wipe clean if crumbs or dust get inside. Overall, this is one of those simple organizational purchases that makes everyday life easier. My kitchen drawers look so much more put together now, and it’s nice not having to dig through clutter every time I need a fork or cooking utensil. Definitely worth it for anyone trying to organize their kitchen without spending a ton.
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Reviewed in the United States on May 21, 2026
J
Verified Purchase
judy knapp
Charlottesville, US
★★★★★ 5
Expandable drawer organizer
Color: Gray, Size: XL (13-22''W x 15''D)
Wonderful addition to the silverware drawer. It expands to fit the size of your drawer. It is well designed and well made. We are very pleased!
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Reviewed in the United States on May 24, 2026

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