12g Capsule [Bisley] CO2 Cartridge (C02) Bulb x500 BULK DEAL

Please note this is a 12g CO2 cartridge that is only usable with compatible products.

Make sure the product you're planning on using this with, is compatible.

 Description:

These 12g Capsule [Bisley] CO2 Cartridge (CO2) Bulbs are a value box of standard 12-gram CO2 powerlets (also called capsules, bulbs, or cartridges) from the Bisley brand, a trusted UK name in airgun accessories.

You get 500 cartridges total at a bulk rate — a common promotional pack size sold by UK retailers like Duncans Gunmakers and others. These are the small, disposable steel cylinders used to power CO2 air pistols, rifles, and some airsoft guns.

Key Specs & Features

Capacity: Exactly 12 grams of compressed CO2 per cartridge (approximately 15 cubic cm volume at ~60 bar / 900 psi when full).

Design: Non-threaded (pierce-type) with a thin sealed neck. The gun’s piercing pin breaks the seal to release gas.
Dimensions (typical): ~83 mm long × 18 mm diameter; each weighs roughly 42 g when full.

Quality notes: Bisley capsules are high-quality, clean-burning, and often pre-oiled/lubricated. This helps maintain seals, reduces wear on O-rings, and ensures smooth, consistent performance shot after shot.

Performance: One cartridge typically delivers 50–80+ shots in a pistol (varies by gun model, temperature, and leakiness). Pressure stays stable as long as liquid CO2 remains inside.

Compatibility & Use

These are universal 12g CO2 powerlets that fit the vast majority of CO2-powered airguns and replicas that use the small bulb style (including many Duncans, Umarex, Crosman, Webley, and airsoft models). They are not threaded (for larger 88g tanks) or refillable — they’re single-use and designed to be punctured once.

Dispose of empty cartridges responsibly (they’re steel and recyclable once fully depressurized).

Always follow your specific gun’s manual for safe insertion and use.