VFC KAC L403A1 KS-1 GBBR Airsoft Rifle – Licensed Knights Armament Replica

The VFC KAC L403A1 KS-1 GBBR Airsoft Rifle is one of the most anticipated releases in recent years, representing the latest collaboration between VFC (Vega Force Company) and Knights Armament Company (KAC). Built as the first rifle in the Knights Stoner (KS) Carbine series, the KS-1 serves as a next-generation evolution of the legendary SR-16 platform. Selected by the British Military under the Project Hunter / Future Commando Force modernization program, it has been officially designated as the L403A1 Alternate Individual Weapon (AIW), complementing the standard-issue L85 and L119 rifles.

This airsoft replica captures the exact details of the L403A1 used by the Royal Marines and UK Ranger Regiment, making it a must-have for collectors, reenactors, and serious players who demand authenticity and performance in one package.

Authentic Licensed KAC Build

VFC has spared no detail in replicating the L403A1. Featuring full licensed trademarks and rollmarks from Knights Armament, the rifle is precision CNC-machined from aluminum for durability and realism. It comes fitted with the 12.8-inch KAC URX 6 M-LOK handguard, paired with a monolithic Picatinny top rail for mounting optics, lasers, grips, and accessories. The proprietary 13.7-inch dimpled heavy barrel gives the rifle its distinctive look, while the KAC QDC flash hider allows direct compatibility with the optional KAC QDC/PRT suppressor (sold separately).

Included with the rifle are KAC folding iron sights, an ambidextrous QD end plate for sling mounting, and the B5 crane stock with QD sling points and rubberized buttpad for recoil absorption. Every detail is true to the issued L403A1, making this one of the most realistic AR-pattern airsoft rifles available today.

Fully Ambidextrous Controls

Designed with modern operators in mind, the KS-1 offers a fully ambidextrous lower receiver. The fire selector, magazine release, bolt catch/release, and charging handle are mirrored on both sides of the rifle, ensuring smooth handling whether you’re left- or right-handed. This makes the KS-1 stand out as one of the first ambidextrous AR-pattern rifles to see real-world military adoption post-2023—authenticity that transfers directly to its airsoft counterpart.

Upgraded VFC V3 GBBR System

At the heart of the KS-1 is VFC’s proven V3 Gas Blowback Rifle system, redesigned for durability and performance. It features:

• Steel hammer set and firing pin for long-lasting reliability.

• Steel reinforced fire control components for consistent performance.

• Precision-machined steel bolt and heavy buffer system for satisfying recoil.

• Safe, semi, and full-auto fire modes with a crisp, realistic trigger feel.

Another major improvement is the Next Generation AR GBB Hop-Up System. This TDC-style hop-up unit is steel reinforced for durability and allows precise adjustments without disassembly using the VFC Hop-Up Adjustment Tool (sold separately). This means quicker tuning on the field for optimal range and accuracy.

Included with the KS-1

• 1x VFC KAC L403A1 KS-1 GBB Rifle (Tan)

• 1x VFC 30-round VMAG V3 GBB magazine (Tan)

• 1x Manual

The included 30-round VMAG V3 magazine offers excellent gas efficiency and even allows players to switch between dry fire mode and last round bolt lock with a simple flick of a switch.

Compatibility

• Picatinny rail & M-LOK handguard (optics & accessories)

• 14mm CCW threading (flash hiders & suppressors)

• VFC V3 GBB magazines

• Next Generation AR Hop-Up Adjustment Tool (sold separately)

• 6mm BBs

Why Choose the VFC KAC L403A1 KS-1?

The KS-1 represents a perfect blend of realism, performance, and collectability. With its full Knights Armament licensing, ambidextrous controls, upgraded V3 internals, and military pedigree, this rifle is ideal for players who want a skirmish-ready gas blowback rifle that mirrors one of the most cutting-edge service rifles in use today.

Whether you’re a British Army enthusiast, AR collector, or serious airsoft competitor, the VFC L403A1 KS-1 delivers authenticity, realism, and performance in one premium package.

✅ Check out more VFC Airsoft Guns and accessories to complete your loadout!