Airsoft Shell Compatibility: CAM870 and M870

Choose airsoft shells by manufacturer, exact model and operating system—not by the M870 name or their appearance. A shell-shaped magazine and an ejecting cartridge serve different systems. Buying a complete replica is also different from buying spare shells.

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APS CAM870 MKIII Magnum: identify the exact version

For the CAM MKIII-M Wood Magnum, APS specifies CO2 stored in the shell, compatibility with MKI and Smart Shot shells, and a 7+1 shell capacity. Cartridge shells are not included in the manufacturer's listed package. These details concern this version, not every shotgun named M870.

View the CAM870 MKIII Magnum or identify the separate Maruzen M870 Wood Stock model. Check the current product status before choosing either.

Before choosing a cartridge

• Record the replica's manufacturer, model and generation.
• Match the cartridge reference and stated BB diameter to that exact replica.
• Check whether the listing sells a complete cartridge, an outer shell, a pack or another component.
• Confirm the specified power source and included consumables in the manufacturer's instructions.

Compatibility questions

Does M870 mean that all shells are interchangeable?

No. Treat APS CAM870, Maruzen M870 and Tokyo Marui M870 as separate product families. Select a shared accessory only when its listing explicitly names the exact models.

Can Magnum and Classic package details be used interchangeably?

No. Check each version separately. The dimensions, capacity and included items of one version do not establish those of another.

Do similar-looking revolver cartridges fit the same replica?

Appearance is not enough. Match the exact product reference, model and BB diameter. A cartridge labelled for another system is not a confirmed substitute.

What if two descriptions disagree?

Pause the accessory choice. Send support the replica and cartridge links with their model references, and request confirmation before ordering. Do not force a cartridge that does not fit.

Manufacturer reference: APS CAM MKIII-M Wood Magnum.