No mate they won't just found this
To be clear an 8.1 mag is First Strike and can be used in either gun.
The FS rounds can only be used in the 8 if it is equiped with the FS barrel.
The 8.1 mag can either use regular non-FS paintballs or FS rounds.
The old 8 mags can NOT be used in the 8.1 gun.
There was a great review of the 8.1 here
http://www.modernintel.ca/reviews/vi...arms-t8-1/280/
It clearly shows the compatiblity of the mags.
Thanks for those who replied. Now i just have to find these low profile tools and see how much they are.