P320-M18 | 21rds | GBB (gas blowback) | magazine | Sig Sauer

Magazine P320-M18 | GBB | 21rds | Sig Sauer – this pistol magazine for reliable performance in the field

This GBB magazine is specifically developed for the Sig Sauer P320-M18 replica and offers a practical capacity of 21 BBs. The magazine combines the realistic operation of a gas blowback system with the reliability you expect from Sig Sauer. The FDE colour matches perfectly with P320-M18 replicas in the same finish.

Technical features and compatibility

With a capacity of 21 rounds, this pistol magazine provides sufficient firepower for tactical scenarios. The magazine operates on gas and is exclusively compatible with Sig Sauer P320-M18 models. Thanks to the GBB system, you experience realistic recoil with every shot. For optimal performance at mild temperatures or indoor use, standard Green Gas is sufficient. In colder conditions, we recommend Red or Black Gas for consistent gas pressure and reliable operation.

Practical use

Filling this magazine is done via the fill valve at the bottom, where you connect the gas bottle upright. Load the BBs by pulling the spring on the side down and inserting the BBs one by one. Due to its compact size, this magazine fits comfortably in standard magazine pouches. The gas not only powers the BB but also provides the blowback action, making shooting extra realistic.

Who is this magazine suitable for?

This magazine is ideal for players who choose a realistic pistol experience with their P320-M18. Whether you are looking for a reliable secondary weapon as a backup or play pistol-only games, this magazine offers the right balance between capacity and handling. The 21 round capacity gives you more firepower than standard pistol magazines, while the size remains compact enough for quick magazine changes.

Ready to add Magazine P320-M18 | GBB | 21rds | Sig Sauer to your loadout?