Ordered 2 CZ 75 recoil springs. After 50 rounds, I disassembled the pistol to find the slide was stuck. Long story short, the spring was quite a bit too long, coil bound, and smashed the recoil spring guide through the frame (destroyed the guide). Had this gun had a metal guide rod, it likely would’ve damaged the frame. I measured it fully compressed against 5 other springs from CZ, CGW, and Wolff. All the other springs (13-18lbs) were exactly the same length, with only one loop of spring visible outside the slide fully compressed. Theirs has 4 loops and is almost .100” longer than the rest. They first said I installed it incorrectly. Then they said there’s something wrong with my brand new 75 omega. They talked to me like I was a child and insulted my intelligence. After reading the reviews here, I probably won’t even send the springs back, as it sounds like I won’t be getting a refund anyway. Very very poor company to deal with. I said from the beginning I felt the spring was simply a qc issue, and they responded with insults.