Keep your Byrna SD ready. This is a 10-pack of genuine Byrna 8-gram CO2 cylinders — the compressed-gas propellant that powers the Byrna SD launcher. CO2 is a consumable: each cylinder is good for a set number of shots, so keeping spares on hand means your launcher is ready whenever you need it.
Compatibility — check before you buy. Byrna's 8-gram cylinders are custom-fit for the Byrna SD launcher. They are not compatible with the Byrna LE (which uses 12-gram CO2), or the Mission 4 rifle (which uses 88-gram CO2). If you own a Byrna SD, this is your CO2. If you own a Byrna LE, you need the 12-gram cylinders instead.
What's in the pack: ten 8-gram CO2 cylinders, including one oiler cylinder pre-loaded with oil — Byrna recommends running an oiler cylinder roughly every 10 cylinders for simple launcher maintenance, so each 10-pack keeps your launcher both fed and maintained.
Honest notes. Keep an un-punctured cylinder in your launcher for self-defense readiness — once a cylinder is punctured it will slowly leak down over time, so a punctured cylinder is for use, not storage. Store cylinders cool and away from children. CO2 cartridges are pressurized and subject to airline/TSA rules — review those before traveling.
Best for Byrna SD owners (and CL / EP / HD owners) who want a ready supply of propellant plus built-in maintenance. Free shipping on orders over $100; 30-day satisfaction guarantee.
SPECS
Type | 8-gram compressed CO2 cylinder (launcher propellant)
Count | 10-pack (includes 1 oiler cylinder for maintenance)
Compatible launchers | Byrna SD, CL, EP, HD
NOT compatible | Byrna LE, CL-XL, SDXL, HDXL, Boost-equipped launchers (12-gram); Byrna Mission 4 (88-gram)
