Hi Impact,most people in Europe(me too) use mag springs from innovatac,high quality springs that last long in 3 different hardness,soft normal and hard.I dont know if its allowed to paste the link.
Hello!
We are a team of 3 shooting IPSC Shotgun in Europe, i would like to share with you our new shooting videos on YouTube,
if you enjoy these videos give us your support by hitting the like and subscribe button!
Thank you very much!
https://www.youtube.com/channel/UCnlHsJgN_a_8LzVFv1M9fpA