No Problems- I like these magazines.
I bought three of the 17 round magazines for my P320 Compact. I replaced the grip module with a Wilson Combat. I first bought two to try because of the negative reviews. I put them through a workout over the past two months. I filled them both to capacity, I used fewer rounds and did mag swap drills. No feed issues, not even one. They fed all types of foreign ammo (times are tough) and didn't miss a beat. I cannot speak to the experiences of others, but I really like the magazines, and I not only would buy them again, I already ordered more for my P320 and another for my VP9.
Don't know yet
Bought to have Xtra mags for plinking. But am still waiting on my piece from manufacturer. Be better able to review when I use them, if they prove to be sub par well no big loss for the price
A miss
Wanted an affordable hi-cap magazine for my CMMG Banshee. Sadly the mags' dimensions are too great to fit the mag well. Wouldn't seat. My Sig mags work great however. Swing and a miss. $30 down the tubes, just glad I didn't order several.
Sticky
This mag. will hold 30 rounds if you overcome the bullet guide from jamming on its way down as it fills. So as it jams on the fill it jams on its return. The bullet guide is a type of plastic as is the mag. so they seem to be tacky to each other and stick.. For the cost there fine for the range but don't expect to trust your life with them, they jam way to often. This is why the oem mags are plastic coated metal with the plastic bullet guide.
Sig magazine
Bought 2 mags both failded to feed every time
Terrible
It is a neat looking magazine and there is something very cool seeing 15 rounds stacked up through the perfectly clear plastic. It is a terrible magazine though, it feels very cheap and flexes with just hand pressure. With 15 rounds in it the plastic bows and it won't drop from a the pistol, in either the factory Sig frame or the Wilson Combat frame. It refuses to feed properly with 115 FMJ from multiple makers or 147 HST. I had the pretty much the same experience with the ETS Glock magazine as well. The only use I can see for this magazine is as a training tool to practice malfunctions on the range. You don't even need to set them up, the mag will do that for you. Hard pass.
Elite Tactical Systems "clear" magazines
Two failures by these magazines: 1. The sides widen when magazine loaded. This causes rubbing against sides of magazine well. Magazine has to be pulled out. Unacceptable! 2. The spring sometimes buckles not allowing the specified number of rounds to be loaded. Unacceptable! I will be returning the seven magazines purchased.
Junk
This is the worst thing I ever bought from Brownells. It doesnt fit the pistol, not even close. Just for the record it is the only bad item I ever bought from Brownells.
Worst Mags ever
Worst mags ever. They get stuck in you mag pouch, you you try to pull them out, the base plate will pop off the body of the mag. I called Brownells and returned them. Don't wast your time.