a main spring for a main spring about the same size with the same amount of loops or a couple of loops more with a heavier guage wire. This might improve fps.
But your best bet would be to just polish the outside and the ends of the main spring with 1200 grit wet sand paper and also polishing the main spring's post then lubing it all with moly paste.
Eddie
Posted on Jun 13, 2008, 4:12 AM from IP address 24.138.246.119