Corhampton, Hampshire, UK

Knights Armament KS-1 L403A1

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L403A1 KS-1 Knights Armament

Our Knight’s Stoner 1 (KS-1) rifle (designated L403A1) is a replica of the UK military issue version and is available in both .22 LR semi-auto and .223 Rem straight-pull. It is built from the same Knight's Armament uppers and lowers, with Magpul furniture to produce a Section 1-compliant replica. It can be cerakoted in any colour, but we encourage black or FDE to stay on theme with the original. Build times will vary, so please contact us for more information and to be absolutly clear this is an un-official UK build by us and not endorsed by Knight Armament in anyway.  

The KS-1 has been taken on by the UK's Commando Forces for its capabilities in all terrains due to its cold forger barrels, its lightweight design makes it far superior to its predecessor, the SA80. Its ability to hold multiple attachments on picatinny rails on the hand guard makes it adaptable to any situation.  "The L403A1 is a high performing modern development of the ArmaLite Rifle (AR), which pushes the boundaries of modern performance. As an AR system, it shares much in common with the rifle systems used by many of the UK’s allies. Given their specialist role, and the critical task of working with and alongside many of the UK’s allies, the platform will enable ASOB to share skills and drills in an efficient manner."

"The AIW is a modern rifle using the latest in design technology and manufacturing methods, to produce an exceptionally reliable and accurate weapon. The magnified optic means the user is able to engage threats from greater distances; whilst the signature reduction system works to mask the AIW from detection from sight and hearing."

“The L403A1 is an exciting step in the evolution of the Army Special Operations Brigade. The new rifle will field our soldiers with an excellent weapon system that is more interoperable with our partners across the world.”

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Barrel: 13.7″ (34.8cm) 1:7 Twist

Caliber: .223 Rem/ 22LR

Weight: 6.88 lbs (3.12kg)

Length: 32.2″ (81.8cm) to 34.2″ (86.9cm)

Shipping Methods

Collection/On-Site Service
Collect your order from our premises in Hampshire or a Blue RPC club shoot. Have a chat with us and a browse whilst you're here!

Royal Mail/Parcel Force 24
Despatched same working day if ordered before 15:00, with next day delivery aim.

International Shipping
Despatched same working day if ordered before 15:00 GMT. Our website automatically detects what country you are in, so if it lets you order it then we can ship there!

​Firearms and Ammunition
See the
RFD Transfer and Club Collection page for more details.