TP9SFX Spring Options
These are the springs that I have used and tested. Your mileage may vary based on your ammo load. 1. Wolff Cold Commander – 13LB: item 42213, 14lb: Item 42214 & 15lb item 42215
https://www.gunsprings.com/COLT/COMMANDER%20SERIES%20PISTOL/cID1/mID1/dID2
PDP 5″ Spring Options
These are the springs that I have used and tested. Your mileage may vary based on your ammo load. 1. Rune Tactical 14 and 15lb springs.
M&P 5″ Spring Options
Springs that I know work. Your mileage may vary based on your caliber and load.
Yes these are listed as Glock, but I know they work with the 5″ M&P guns. The 437## size. The ## is spring weight.https://www.gunsprings.com/GLOCK%20%C2%AE/cID1/mID5/dID116#109
We sell these as well https://w74guiderods.com/product/mp-14lb-wire-spring/