Niksan Defence Serpent-S 5.5 mm Air Pistol

Niksan Defence Serpent – a precision CO2 air pistol designed for use with diabolo pellets, equipped with a rifled barrel for enhanced accuracy. Engineered for both target shooting and recreational use, it features an ergonomic grip with palm shelf and optional stock mount. The pistol comes fitted with open sights, including an adjustable rear sight. Available in .177 (4.5 mm) and .22 (5.5 mm) calibers, the Niksan Serpent offers an exceptional balance of performance, build quality, and affordability—making it an ideal choice for both sport and hobby shooters. Powered by a standard 12g CO2 cartridge, it’s a great option for those starting out in precision shooting without the extra cost of PCP accessories.

BA (Bolt Action) – this model features a four-stroke side lever charging handle positioned on the left side of the receiver. The bolt action system is known for its reliability, ensuring consistent and smooth operation with every shot.

Barrel – high-precision rifled barrel, 8.27" (210 mm) in length, offering excellent durability and accuracy. The barrel is choked at the muzzle to improve pellet stabilization, significantly enhancing shot precision. It ends in a ½" UNF thread, allowing for the attachment of a suppressor (included) or a muzzle compensator, improving shooting comfort and effectiveness.

Power source – a 12g CO2 cartridge, housed in a chamber beneath the barrel. Each cartridge yields approximately 40 consistent shots. The use of replaceable CO2 capsules makes it perfect for extended outdoor shooting sessions without the need for refills.

Grip – made from durable black polymer, the anatomically shaped pistol grip with palm shelf is contoured for hand and finger support, providing excellent ergonomics. Designed for both right- and left-handed shooters, it ensures comfort and stability during use. The grip can be extended with an optional stock, converting the pistol into a compact carbine—ideal for those seeking versatility in a single platform.

Mounting rail – an 11 mm dovetail rail allows for easy installation of optical sights, such as a red dot or rifle scope, enhancing aiming precision and overall shooting performance. A great choice for users aiming to maximize their accuracy.

Magazine – rotary magazine with a capacity of 7 to 9 pellets, depending on caliber. Reloading is handled by a bolt-action lever, which cocks the striker, rotates the magazine, and chambers the next round—mirroring the mechanism of PCP rifles. The set includes two magazines for convenience and continuous shooting. Ideal for shooters seeking functionality and ease of use.

Also included is the SSA (Single Shot Adapter), which allows for precise single loading—perfect for eliminating pellet deformation caused by magazine rotation. A must-have for shooters demanding ultimate accuracy and shot-to-shot consistency.

Included in the set:
– Two rotary magazines
– SSA (Single Shot Adapter)
– Suppressor
– Shoulder stock
– Set of replacement O-rings

Technical Specifications:
Model: Serpent-S
Type: CO2 air pistol
Muzzle energy: up to 17 J
Overall length: 390 mm / 15.35" (without stock), 635 mm / 25" (with stock)
Barrel length: 210 mm / 8.27"
Weight: 0.87 kg / 1.9 lbs (without stock), 1.2 kg / 2.6 lbs (with stock)
Power source: 1 x 12g CO2 cartridge

Grip: Detachable high-quality synthetic stock
Manufacturer: Niksan Defence, Turkey

Detailed Specifications – FAC version (*):
Caliber: 4.5 mm / .177
Max muzzle velocity (**): 152 m/s (500 fps)
Energy: 6.3 J / 4.7 ft.lbs
Magazine capacity: 9 rounds
Effective shots per cartridge: 40

Detailed Specifications – FAC version (*):
Caliber: 5.5 mm / .22
Max muzzle velocity (**): 122 m/s (400 fps)
Energy: 7.7 J / 5.6 ft.lbs
Magazine capacity: 7 rounds
Effective shots per cartridge: 40

* The above maximum values, provided by the manufacturer, apply only to non-restricted (FAC) models.
** Muzzle velocity may vary by up to 20% depending on pellet weight, shape, ambient temperature, and other environmental factors.

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