these sound like presets to be honest
you should look into sound design
Honestly I think they were from Autogun, I don't really remember. This was before I realized that the FL studio demo had 3x Osc, though.
when the drum plays alone at the beginning, you should add a background discret ambient instrument.
for the "metalic instrument", less reverb should sounds better, and for the lead synth, a lil delay should make it more epic and spacious.
otherwise, great instumental ;)