Thread: DPM recoil systems

I watched a video on you tube a while back about these springs and it got me wondering. I want to know if anyone here has used them or anything like them and if they work ? Would they be worth the money ? Could they damage the gun at all ? are they legal for competition ?
I wanted to spruce up a couple guns I have and have thought about competition later on but am guessing that these springs wont be legal for that. I can always get a trigger job and lesser LB springs too, I have lots of thoughts always seems like I want to make the best guns better if possible.

I want to put these in a CZ SP01 for range and Glock 32 for CCW.