With a capacity of 30 6mm BBs, these magazines are true real cap gas magazines to go with the more realistic versions of WEs open bolt M4s and SCARs.
Being mostly composed of metal (as is typical of gas magazines) they are tough and sturdy besides also having a good weight to them which adds some realism.
These magazines are available in both black and tan finishes to match both those black GBB rifles as well as the tan ones like the SCAR.
Disclaimer: All aftermarket upgrade parts require necessary skill or modification to install and assemble, please consult with your airsoft technician if needed.