Do these fit the Byrna SD, EP and HD?

Yes. Byrna lists these 12-gram cartridges for the SD, EP and HD launchers. They are not for other brands or for 8-gram air guns.

What does the lubricated cartridge do?

It carries oil through the launcher's valve and internals as it discharges. Byrna recommends using it periodically to keep seals and moving parts lubricated.

How often should I use the lubricated one?

Byrna's guidance is to run a lubricated cartridge through the launcher at regular intervals rather than every session. With one per 10-pack, most owners use it after several boxes of plain CO2.

Is $12.96 a good price?

It is at the low end of the recent range for this 10-pack, at Fast Ammo as of November 4, 2026. Generic 12-gram CO2 still costs less per cartridge, but it does not include the lubricated cylinder.

Ten 12-gram CO2 cartridges, one of which is lubricated. Nothing else is included.

Can I use plain CO2 cartridges instead?

Yes, any standard 12-gram CO2 cartridge will power the launcher. The Byrna pack is mainly worth it for the lubricated cartridge and the sealed factory packaging.

Where can I buy the Byrna 12 Gram CO2 Cartridges 10-Pack (1 Lubricated)?

2 stores we checked sell it, including Amazon, Fast Ammo.

Byrna 12 Gram CO2 Cartridges 10-Pack (1 Lubricated)

Q: Where is the Byrna 12 Gram CO2 Cartridges 10-Pack (1 Lubricated) cheapest?

At Fast Ammo, for $12.96, as of our latest check.

Best price now

$12.96at Fast AmmoObserved at 5:30 AM

Compared across 2 stores. Prices are checked against each store and labelled with when.

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Our take on the Byrna 12 Gram CO2 Cartridges 10-Pack (1 Lubricated)

A 10-pack of 12-gram CO2 cylinders for Byrna SD, EP and HD launchers, with one cartridge pre-lubricated to oil the launcher's internals. The lubricated cylinder is the reason to buy this pack over generic 12-gram CO2: Byrna recommends running one through the gun periodically to keep seals and the trigger mechanism smooth. At $12.96 at Fast Ammo as of November 4, 2026, it sits at the low end of its recent range, and only two stores list it new.