Extended mag?

[Pathtoyorsoul]

So I'm looking for extended mags for my M&P 40. I figure they would be a blast at the range and I could leave one in at night since she's my bedstand choice. The couple I've found don't have the best reviews. Anyone have some or know of any that are good quality and really reliable so I could leave in at night? Most I've seen take the standard 15 rounders up to 20. That's fine by me. Ideas/opinions?

 

[Bkreutz]

I use Taylor Freelance and Speed Shooter Specialties, Taran Tactical are good ones also.

 

[chipking]

My 9mm PRO CORE had 5 of the Taylor Freelance extensions and the Brownells increased power mag springs when I traded for it and I never had a single hiccup over many many rounds. After I finally came to realize that for MY use 17 round mags were enough I traded with a fellow shooter that "just had to have them". As far as I know he has never had a single failure with them either.
Not sure if the 40 will be as reliable but I suspect that they would be.
Chip King