It's designed for the tipmann 98 style fitting so would not fit the a5
However it would be possible to remove the cyclone and modify / make an adaptor point with some DIY skills
Dont know about the A5 ADAPTER Kit, but i have the Vortex kit as well as a A5. Would recommend it. Takes the Helix mags too which are great and can be used for FS if you upgrade the feed spring.