M4 Upgrade Help

Discussion in 'General Airsoft Discussion' started by sethjones304, Jan 1, 2013.

  1. sethjones304

    sethjones304 New Member

    I need some help upgrading my SRC SR4. I want it to shoot around 25-30 bps with an m100 spring, very smooth and accurate. My price cap is upwards of $400. PLEASE HELP ME!!!!! Thanks in advance.