MC Systems is an Australian effects pedal company founded in 2013 by Warren McAlister, a longtime electronic instrument industry veteran with experience across Australia, Hong Kong and China. The pedals are designed near Sydney and manufactured in China. The brand is best known for its Apollo Series, an analog pedal line whose models are named after international airports — including the SYD String Reviver, LAX Glass Chorus, BSL Hybrid Chorus, NKM Dynamic Drive, LHR Dynamic Distortion, BWI Dynamic Fuzz and CGN Dynamic Delay.

The defining feature across the Apollo line is the proprietary V-Switch footswitch system, which McAlister markets as "Dynamic Response" pedal design. The pedals are true bypass, but the V-Switch is velocity-sensitive: how hard the player stomps on the footswitch changes the intensity or character of the effect, with an adjustable threshold to suit different playing styles. The String Reviver is an unusual entry in the lineup, designed to add presence and high-end clarity to dull or worn strings rather than apply a traditional time- or gain-based effect.

MC Systems has 7 products cataloged on Equipboard, including Chorus Effects Pedals, Fuzz Effects Pedals, and Delay Effects Pedals.