Travel back in time to 1984 and open a gun shop. Arnie will come in and ask for an Uzi 9mm. You can then suggest the Mac 10 as a good alternative. It will be the start of a beautiful friendship. You can then persuade Arnie to remain friends with your mate and he will end up backing the gym in the future. Job done.
And then Arnie will come over the top of Asim by asking for a Phased plasma rifle in the 40-watt range.