VKS Vykhlop

Lore & Background

The VKS Vykhlop was developed around 2002 for the special force units of the FSB, emerging from a program that gave the weapon its additional name 'Vykhlop' (Exhaust). It is chambered for the 12.7×55mm STs-130 subsonic round, a cartridge designed to provide silent firing with penetration much greater than that of the earlier 9×39mm VSS silenced sniper rifle. The weapon is a bullpup, straight-pull, magazine-fed design with an integral suppressor.

Typical targets for the VKS are combatants in heavy body armor or behind cover. The cartridge family includes several variants: the standard STs-130, the training STs-130U, the increased-accuracy STs-130PT (with a 59-gram bullet) and STs-130PT2 (with a solid bronze bullet), and the increased-penetration STs-130VPS (with a 76-gram bullet). The STs-130VPS is capable of penetrating 16 mm of steel at 200 meters, or body armor up to GOST 5 at 100 meters. Accuracy is claimed as 1 minute of arc at a 100-meter range with precision bullets.

Photos of what appears to be a different variant of the VKS, or one of the similar competitive weapons from the same or similar development program, show a muzzle suppressor that can be removed and the weapon fired without it.

Reader's Guide

The VKS Vykhlop occupies a specific niche in Russian special operations weaponry: a silenced sniper rifle that can defeat heavy body armor and light cover while remaining subsonic and quiet. Its development around 2002 for FSB special forces reflects a requirement for a weapon that could engage protected targets without revealing the shooter's position, a capability the 9×39mm VSS could not fully provide. The 12.7×55mm STs-130 round, with its 97 mm overall length, was purpose-built for this role, offering a range of loadings from training to precision to armor-piercing. The claimed accuracy of 1 MOA at 100 meters with precision bullets indicates a design focused on practical engagement distances rather than extreme long-range performance. The integral suppressor is a key feature, though photos suggest a variant or competitor allows the suppressor to be removed. The VKS's legacy lies in its role as a specialized tool for FSB units, addressing a gap between standard suppressed rifles and larger anti-materiel weapons. Its bullpup configuration keeps the weapon compact, and the straight-pull action simplifies operation while maintaining a fixed barrel for accuracy. The weapon's existence underscores the continued development of subsonic ammunition and suppressed firearms for clandestine and counter-terrorist operations.

Did You Know?

• The VKS is also known as the VSSK and the Vykhlop (Exhaust), the latter coming from its development program.
• The STs-130VPS armor-piercing variant can penetrate 16 mm of steel at 200 meters.

Origins & Strategic Purpose

The VKS Vykhlop emerged from a Russian special-operations development program around 2002, specifically tasked to the FSB's elite units. The designation "Vykhlop," translating simply as "Exhaust," was inherited from the broader program under which the rifle was conceived, and the weapon is also catalogued under the alternate name VSSK. Its creation answered a clear tactical gap: operators needed a silenced platform whose penetration authority far exceeded what the existing 9×39mm VSS could deliver against modern threats. The design philosophy centered on two non-negotiable requirements—near-silent firing and the ability to defeat heavy body armor or shoot through cover—making it a purpose-built tool for covert engagements rather than a general-purpose sniper system. By chambering the larger 12.7×55mm STs-130 subsonic cartridge, engineers ensured that each round carried substantially more kinetic energy and sectional density than the older 9×39mm round, while still remaining subsonic to preserve the acoustic signature that defines a true suppressed weapon. The result was a rifle that occupied a distinct niche in Russian special-operations arsenals, bridging the gap between conventional sniper rifles and specialized anti-material platforms.

Design & Mechanical Architecture

The VKS adopts a bullpup layout with a straight-pull operating mechanism and a detachable magazine, a combination that keeps the overall profile compact while allowing rapid follow-up shots. At its core sits the 12.7×55mm STs-130 subsonic cartridge, whose projectile measures just 97 mm in overall length—a dimension that accommodates the round within the bullpup's shortened action without sacrificing the bore diameter needed for armor-piercing performance. A permanently mounted integral suppressor is built into the barrel assembly, eliminating the need for a separate silencer and ensuring that every round exits at subsonic velocity, keeping the report at a level suitable for covert operations. The manufacturer claims an accuracy figure of one minute of angle at a 100-meter distance when loaded with precision-grade ammunition, a level of consistency that places the VKS firmly in the category of dedicated sniper platforms rather than merely a large-caliber sidearm. The straight-pull cycling action, as opposed to a conventional long-stroke or short-stroke bolt, allows the operator to chamber and extract a round with a shorter, more natural hand travel, a design choice that suits the close-quarters and rapid-reaction scenarios in which FSB operators are most likely to employ the weapon.

Ammunition Family & Penetration Performance

The STs-130 cartridge family represents a deliberate progression of performance tiers tailored to different operational needs. The standard STs-130 round serves as the baseline, while the STs-130U variant is designated for training exercises, allowing units to practice without expending combat ammunition. Two accuracy-focused variants follow: the STs-130PT, which employs a 59-gram projectile, and the STs-130PT2, which substitutes a solid bronze bullet for enhanced precision. At the top of the penetration scale sits the STs-130VPS, loaded with a 76-gram bullet engineered to punch through 16 millimeters of steel plate at a distance of 200 meters or defeat body armor rated to GOST 5 standard at 100 meters. These figures underscore the rifle's intended role: neutralizing adversaries who rely on heavy protective equipment or who take position behind improvised or permanent cover. Because every variant in the family fires at subsonic velocity, the acoustic penalty of the suppressor remains consistent regardless of which load is selected, preserving the weapon's core identity as a silent-killing platform while offering operators a meaningful choice between maximum accuracy and maximum armor defeat.

Combat Service & Variant Observations

Although developed for the FSB's special operations directorate, the VKS Vykhlop has seen documented employment in the Russo-Ukrainian war, where it was used by Ukrainian forces—a testament to the weapon's broader operational relevance beyond its original Russian service context. In combat, the rifle's primary targets are combatants wearing heavy body armor or operating from behind cover, scenarios where a conventional 9×39mm suppressed round would simply lack the energy to terminate the threat. Visual documentation of the weapon in service has also revealed what appears to be a variant, or a closely related competitive design from the same or a similar development program, distinguished by a removable muzzle suppressor. This detachable configuration would allow the rifle to be fired without the silencer, potentially increasing muzzle velocity and effective range at the cost of the acoustic signature that defines the platform. The existence of such a variant suggests that the development program explored multiple configurations to suit different mission profiles, from fully suppressed covert engagements to louder but more powerful direct-fire roles, giving operators flexibility within a single weapon system.