Here are the following main springs used for MPA Pistols:
- DS9 Hybrid 9mm – 8LB ISMI
- DS9 LOC – 8LB ISMI
- DS Open (38SC and 9mm) – 7LB ISMI
- DS Open Steel Challenge – 6LB Wolff
- Commander – 10LB Variable Wolff
Here are the following main springs used for MPA Pistols: