I just received mine directly from S&W
After about 6 to 8K rounds, mine mags gave up the ghost. Although cleaned them regularly I contacted S&W. Spoke with Carrie Anne Brett. She sent me a shipping label and shipped replacements. I am not gonna lie, it takes a while, but since the follower's were not following. They were useless anyway. I live in MD which has hokey laws. You can not purchase large capacity (Greater than 10) but it's not illegal to own. I purchased my 25 rounders from my gun range which is in Delaware. (Odd laws there too) They can sell me 25 rounders but not Delaware residents. All this to say S&W simply shipped the replacement 25 rounders to the range FFL. They in turn gave me free of charge.