Ultimate SRS Upgrade Kit (510mm 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 Hopup Chamber - Ultimate Edition
• Stalker SRS Scorpion - Ultimate Edition
• Stalker Morpheus 510MM Inner Barrel
• Stalker SRS Fluted Teflon Cylinder
• Stalker Official Logo Patch

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.

• Rapax RMS 2+ Spring (includes tensioners to increase FPS/Joule if needed).

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

Product Descriptions:

Kraken Hopup Chamber

• Easy setup for both professional and new players (~2-minute bucking swap)
• 100% self-alignment system for perfectly straight installation
• 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 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. This unique concept uses six weights that form the piston body itself. Since the piston is made up of these weights, it can also be extended with additional weights (short-stroke), reducing cylinder volume and overall joule output.

Morpheus 510MM Inner Barrel

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

We chose stronger and more durable SUS304 seamless steel to raise the performance 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, as it is optimized for machinability. SUS304 steel is harder to machine but offers greater durability and excellent corrosion resistance.

Fluted Teflon Cylinder

This cylinder is a Teflon fluted version of a standard cylinder and gives your SRS A1 or A2 a premium look. The inner coating is applied using a cold treatment process, ensuring the cylinder retains its perfectly straight shape—something that is not always the case with heat-treated cylinders. In addition to improved aesthetics, the special inner coating enhances energy transfer with pistons, potentially increasing joule output if your piston uses a correctly sized cup.

• Fully compatible with both 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 considerably shorter, have a slightly heavier pull, and provide quieter shots. They are also 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/

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