L403A1 (Serpent Guard)

Firearms · KAC

The L403A1 is a 5.56×45mm NATO, gas-operated, magazine-fed rifle adopted by the British Armed Forces through the Alternative Individual Weapon Program. Built by Knight's Armament Company, it is based on the AR-15 platform and features a free-floating barrel for enhanced accuracy, fully ambidextrous controls, and an M-LOK handguard for attaching accessories. Intended to replace the L85A3 in frontline service, the L403A1 is optimized for optical sights and modern soldier systems, ensuring full compatibility with current infantry gear.

Sell price$720

Grid size2x1

Weight0.7 kg

CategoryFirearms

Tier4

Short nameL403A1

Moa0

Manipulation Modifier15

Fire Rate800

Muzzle Speed900

Fire Noise In Decibels140

Fire Mode5

Maximum Shots6500

Bolt CatchYes

Repair Difficulty Modifier0.8

MechanismAutoLoading

Caliber556x45

Sell to

Artisan, Banshee, Gunny, Turncoat$720

All Gear

Compatible Parts

Pistol GripCritical

AR CRC Pistol Grip

КРУК "Crook"

$150

AR CRC Pistol Grip (FDE)

КРУК "Crook"

$150

AR CRC Pistol Grip (Olive)

КРУК "Crook"

$150

A2 Pistol Grip

COLT

$51

DD Enhanced AR Pistol Grip

Daniel Defense

$96.9

DD Enhanced AR Pistol Grip (Black)

Daniel Defense

$96.9

DD Enhanced AR Pistol Grip (MilSpec)

Daniel Defense

$96.9

DD Enhanced AR Pistol Grip (Silent Watch)

Daniel Defense

$122.4

M16A1 Pistol Grip

Norinco

$40.8

MOE Pistol Grip

Magpul

$66.3

MOE Pistol Grip (FDE)

Magpul

$66.3

MOE Pistol Grip (Gray)

Magpul

$66.3

MIAD Pistol Grip

Magpul

$61.2

MIAD Pistol Grip V2 (FDE)

Magpul

$117.3

MOE Pistol Grip (Raven Team)

Magpul

$135

MOE Pistol Grip (Serpent Guard)

Magpul

$135

Norinco CQA1 Pistol Grip

Norinco

$30.6

SIG MCX Pistol Grip

SIG Sauer

$61.2

SIG MCX Pistol Grip (Ghost Nomad)

SIG Sauer

$114

Torque Pistol Grip

General West

$94.35

Torque Pistol Grip (FDE)

General West

$94.35

MOD Pistol Grip

General West

$117.3

MOD Pistol Grip (FDE)

General West

$117.3

MOD Pistol Grip (Phantom Lance)

General West

$117.3

ReceiverCritical

L403A1 Upper Receiver

KAC

$357

L403A1 Upper Receiver (Serpent Guard)

KAC

$567

StockCritical

M4 Buffer Tube

COLT

$91.8

M4 Buffer Tube (FDE)

COLT

$91.8

M4 Buffer Tube (Phantom Lance)

COLT

$153

M4 Buffer Tube (Raven Team)

COLT

$153

M4 Buffer Tube (Silent Watch)

COLT

$153

KAC Buffer Tube

KAC

$117.3

KAC Buffer Tube (Serpent Guard)

KAC

$225

M16A1 Buffer Tube

COLT

$45.9

CQ A1 Buffer Tube

Norinco

$45.9

HandleCritical

AR-15 Ambidextrous Charging Handle

KAC

$81.6

AR-15 Ambidextrous Charging Handle (Serpent Guard)

KAC

$96

AR-15 Supreme Charging Handle

Antreg

$70.38

AR-15 Supreme Charging Handle (Phantom Lance)

Antreg

$87

F1 Charging Handle

F1-Firearms

$57.12

SCH 5.56 Charging Handle

Geissele Automatics

$69.87

SCH 5.56 Charging Handle (DDC)

Geissele Automatics

$69.87

AR-15 GRIP-N-RIP Charging Handle

Daniel Defense

$58.65

M16A1 Charging Handle

COLT

$35.19

Standard GI Charging Handle

COLT

$35.19

CQ A1 Charging Handle

Norinco

$35.19

Magazine

ATI S60 5.56x45mm/.300 BLK 60-Round Magazine

Schmeisser

$36.6ATI S60 5.56x45mm/.300 BLK 60-Round MagazineATI S60 5.56x45mm/.300 BLK 60-Round Magazine

DD 5.56x45mm/.300 BLK 32-Round Magazine

Daniel Defense

$23.4DD 5.56x45mm/.300 BLK 32-Round MagazineDD 5.56x45mm/.300 BLK 32-Round MagazineDD 5.56x45mm/.300 BLK 32-Round Magazine

PMAG 5.56x45mm/.300 BLK 20-Round Magazine

Magpul

$11.4

PMAG 5.56x45mm/.300 BLK 30-Round Magazine (FDE)

Magpul

$17.1

PMAG 5.56x45mm/.300 BLK 30-Round Magazine

Magpul

$17.1PMAG 5.56x45mm/.300 BLK 30-Round MagazinePMAG 5.56x45mm/.300 BLK 30-Round MagazinePMAG 5.56x45mm/.300 BLK 30-Round MagazinePMAG 5.56x45mm/.300 BLK 30-Round MagazinePMAG 5.56x45mm/.300 BLK 30-Round Magazine

STANAG 5.56x45mm/.300 BLK 20-Round Magazine

General West

$20.4

STANAG 5.56x45mm/.300 BLK 30-Round Magazine

COLT

$22.2STANAG 5.56x45mm/.300 BLK 30-Round MagazineSTANAG 5.56x45mm/.300 BLK 30-Round MagazineATI S60 5.56x45mm/.300 BLK 60-Round Magazine

ATI S60 5.56x45mm/.300 BLK 60-Round Magazine (Ghost Nomad)

Schmeisser

$84

ATI S60 5.56x45mm/.300 BLK 60-Round Magazine (Phantom Lance)

Schmeisser

$84

ATI S60 5.56x45mm/.300 BLK 60-Round Magazine (Serpent Guard)

Schmeisser

$84DD 5.56x45mm/.300 BLK 32-Round MagazinePMAG 5.56x45mm/.300 BLK 20-Round MagazinePMAG 5.56x45mm/.300 BLK 30-Round Magazine (FDE)PMAG 5.56x45mm/.300 BLK 30-Round Magazine (FDE)PMAG 5.56x45mm/.300 BLK 30-Round MagazinePMAG 5.56x45mm/.300 BLK 30-Round MagazineSTANAG 5.56x45mm/.300 BLK 20-Round MagazineSTANAG 5.56x45mm/.300 BLK 30-Round Magazine