Skirmshop field guide · Silverback Airsoft · 2026
The bullpup built
around silence
A compact bullpup precision platform built around a straight-pull spring action, SRS-proven air volume and an unusually serious approach to sound suppression.
01A new branch of the Silverback family
VKS design, SRS DNA
The VKS is a 6 mm airsoft sniper rifle inspired by the distinctive VKS/VSSK silhouette, but it is its own purpose-built airsoft platform rather than a one-to-one reproduction. Silverback has returned to its bullpup roots and combined the layout with lessons learned from both the SRS and TAC-41.
The official manual confirms that the spring-powered VKS shares three core mechanical elements with the SRS: the cylinder, piston and spring guide. It also uses the same 41 cc of usable air volume as the SRS and TAC-41. From the TAC-41 side, the VKS adopts a top-dead-centre hop-up concept and a high-capacity magazine philosophy. The result is short where it matters, mechanically familiar to experienced Silverback technicians, and easy to strip without turning routine maintenance into a workshop project.
02Choose the silhouette
Silenced or Compact?
Both versions use the same 350 mm inner barrel and the same core spring system. The difference is the external sound-management package, overall length and weight. The Silenced model includes Silverback’s full-size VKS silencer; the Compact model keeps the extraordinary 649 mm bullpup footprint.
- Overall length
- 1,124 mm649 mm
- Net weight, spring configuration
- 4,408 g3,427 g
- Inner barrel
- 350 mm
- Front assembly
- Full-size VKS silencer, 981 gCompact muzzle configuration
- Available colours
- Black · Flat Dark Earth · Olive Drab
Interactive 3D preview
Explore the VKS from every angle
Choose Silenced or Compact, then drag to rotate the rifle and inspect the complete profile.
On mobile, the 3D model downloads only when you choose to load it.
Drag to rotate · Scroll or pinch to zoom
Accessories in lifestyle photography: scopes, bipods and other equipment shown in some images are not included unless the product page explicitly says so. Generated field scenes are concept visuals; the studio images in section 03 show the exact commercial colour and version combinations.
03Six official configurations
Every VKS version
04Spring-powered straight-pull cycle
How the VKS works
The VKS is operated through a linear bolt movement rather than a traditional rotating bolt. The spring drives a piston inside the 41 cc cylinder; compressed air then accelerates the BB through the hop-up and 350 mm inner barrel. The bullpup layout places this mechanism behind the trigger, preserving full cylinder volume in a remarkably short rifle.
05TDC hop-up
One click at a time
The VKS uses a dedicated top-dead-centre adjustment wheel. Each click changes nub pressure by approximately 20 micrometres. Fifty positions provide a total range from 0 to 1,000 micrometres. Silverback also supplies two taller nubs that shift the available adjustment window by approximately +250 or +500 micrometres.
Turn the wheel clockwise to add hop and counterclockwise to reduce it. Start low, fire a controlled group with the BB mass and energy you will actually use, then add hop gradually until the trajectory is stable without climbing excessively. Keep the rifle upright while testing; canting the rifle introduces side spin.
Whenever BB mass, muzzle energy, nub or bucking changes, reset and tune again. Excessive pressure can jam the chamber. Chronograph the rifle after hop changes because the setting can alter measured energy. The chamber, nub, bucking and inner barrel must remain clean and dry.
06Sound signature
Built around silence
Silverback describes the VKS as likely to be one of the quietest spring-powered bolt-action platforms currently available in airsoft. That is a manufacturer positioning statement, not an independent laboratory ranking, but the engineering direction is clear.
This is why the right premium build is not simply “the strongest spring.” A truly top-tier VKS should balance the air volume, piston mass, cup, airbrake, spring, hop seal and BB weight, then prove the result on a chronograph and in a sound test. Efficiency and impact control are what create a refined rifle.
07Stalker upgrade path
Build the premium VKS
The official VKS manual explicitly confirms shared SRS cylinder, piston and spring-guide mechanics. The official exploded view also identifies SRS-family airbrake and spring-guide part numbers inside the VKS spring assembly. Skirmshop has additionally confirmed a dedicated VKS conversion path for the Stalker hop system: the Stalker chamber works with a small VKS-specific adapter, while the Stalker Morpheus inner barrel and Stalker bucking are compatible. This creates a complete premium air-and-hop upgrade path without implying that every SRS part fits the VKS.
08Maintenance that preserves performance
Keep the quiet rifle quiet
- Keep the hop-up unit, bucking, nub and inner barrel clean and dry. Oil in the hop system destroys consistency.
- Use only a small amount of suitable lubricant on the cylinder seals and sliding surfaces identified by Silverback. More lubricant is not better.
- Check the silencer and front assembly for correct seating; stop when the thread reaches its natural end and never overtighten it.
- Inspect the magazine feed lips, follower and channel. Dirt in the high-capacity double-stack magazine can create intermittent feeding.
- After any piston, spring, airbrake, seal, nub or hop change, verify bolt engagement, safe operation and muzzle energy before field use.
- Store the rifle unloaded, uncocked and dry. Remove the magazine and confirm that the five-BB feed path is clear.
Official manual, explained visually
Controls, magazine, hop-up and internals.
These selected diagrams support the guide; they do not replace the complete safety and maintenance instructions. Download the current official manual and exploded views from Silverback before disassembly.
VKS in its element
Official Silverback video workshop
Nine VKS procedures, explained step by step
Silverback has published every VKS operation as a separate tutorial. Watch the exact procedure, then use the notes below to understand what the video changes, which parts or tools it needs and what must be checked afterwards.
Field strip and reassembly
Basic tool-free disassembly, barrel removal with a 5 mm Allen key and complete reassembly. Start here before routine cleaning or lubrication.
Watch on YouTubeMain-spring replacement
Shows how to replace the standard APS 13 mm spring. Use it to set legal field energy, then chronograph the rifle and confirm safe bolt engagement.
Watch on YouTubeHop-up nub replacement
The supplied nubs are 0 µm, +250 µm and +500 µm. Fit a taller nub when maximum hop is insufficient; step down if feeding resistance or jams appear.
Watch on YouTubeMagazine disassembly
The complete 63-BB magazine mechanism comes out with a 5 mm pin punch for routine cleaning. Opening the two internal shells needs a small Allen key and is not shown.
Watch on YouTubeFixed dust-cover setup
Converts the ejection-port cover so it stays closed while cycling. It is less realistic, but better protects the mechanism from dust, mud and rain.
Watch on YouTubePiston-sear adjustment
Explains the three key symptoms: no piston latch, slam-fire or unreliable safety, and a latched piston that will not release. Make small adjustments and perform every safety check before use.
Watch on YouTubeRight-to-left conversion
Moves the bolt operation to the left-hand configuration. The conversion requires Silverback's dedicated SBA-BTH-80 left-hand bolt handle.
Watch on YouTubeSRS outer-barrel conversion
An SRS outer barrel requires a Silverback FAST hop-up chamber. The VKS cosmetic cover hides the external TDC wheel; adjust FAST with a small tool or Silverback's printable VKS tool.
Watch on YouTubeInner-barrel extension
Replaces the factory 350 mm barrel; the example uses a 578 mm SRS barrel. A full-size suppressor supports up to 571 mm and a half-size up to 467 mm with 20 mm SBA-BBS-10 spacers; extra length remains unsupported at the front.
Watch on YouTubeOfficial videos by Silverback Airsoft · published 4 August 2026. Follow the current manual and verify safe operation and muzzle energy after any mechanical or hop-up change.
09VKS answers
Is the VKS an SRS in a different body?
No. It is a distinct platform with dedicated VKS bodywork, magazine, barrel assembly and TDC hop-up. It shares the SRS cylinder, piston and spring-guide mechanics, which is why selected SRS-system upgrades are relevant.
Will every Stalker SRS product fit?
No. The confirmed path includes the shared piston, spring-guide and airbrake architecture, plus the Stalker chamber when installed with the dedicated VKS adapter, the Stalker Morpheus inner barrel and the Stalker bucking. The chamber is not a direct fit without the adapter. A Stalker cylinder still requires physical production fitment, while SRS magazines and external parts remain VKS-specific.
Is it the quietest airsoft sniper rifle on the market?
Silverback states that it is likely to be one of the quietest spring-powered bolt-action platforms available. We describe it that way until comparative, repeatable sound testing supports anything more absolute.
Does the Compact version lose barrel length?
No. Both official versions use a 350 mm inner barrel. The main difference is the external front assembly, overall length and total weight.
How many BBs does it hold?
The dedicated VKS magazine holds 63 BBs, and the feed tube holds a further five. Always account for those remaining BBs when unloading.
When is the preorder expected to ship?
The current estimated shipping date is 1 September 2026. If the manufacturer schedule changes, the product page will carry the latest date.
Primary sources
Prices, availability and preorder state on this page are read live from the shop. Lifestyle images are concept visuals; the studio photographs show the exact commercial configurations.
→Parts for this build
Add the confirmed upgrades
Stalker parts whose status on the VKS is confirmed by the guide: the piston and spring guide, the airbrake set and the bucking set.
Pending fitment
The Stalker hop-up chamber only fits with the dedicated VKS adapter, which is not published yet. Listed so you can see it, not because the conversion is signed off.