Suitable for shooting any airsoft gun, standard or upgraded. Please note that Excel have a typical actual size of 5.91 mm, while most other brands are 5.95 mm. This can affect the operation in some models that feed from a double row (like the KSC M11 and similar models).
Get a BB bottle to store and carry these BBs with you into battle so that you can reload as needed. An auto-loader will also make loading BB's into standard AEG magazines much easier.
Disclaimer: All aftermarket upgrade parts require necessary skill or modification to install and assemble, please consult with your airsoft technician if needed.