I just picked up 2 of these mags to try out . The 22 round mag has the same issue . I was able to get 19 and 21 rounds in the mag on separate loadings . Going to give it another try before I get a hold of you guys

Any plans for G20 and G21 mags in the future?

It was low 60s and overcast/sunny.

I got the new springs from customer service a few days after emailing them, and as far as I can tell they fixed the issue.

I bought five of the ETS .40 19 round magazines and unwrapped two for testing. In my G35 Gen4, the first few mags functioned perfectly. Then after 5-6 rounds had been fired from the fully loaded mag, I began to experience fail to feeds nearly every shot with both mags. There were two types of fails that were identical in each mag. One would be the nose of the round being fed into the top of the chamber. The other was the slide locking back without the slide stop being activated and the round not being stripped from the magazine. It appeared to not have enough spring tension to push the nose of the round upwards in time to be fed. The malfunctions were occurring on every mag full.

I emailed ETS and inquired if there were any known issues with this particular magazine. I was promptly answered, was told there were reports of issues with them in some G35's, and was offered to return the magazines. I opted to first try them in other pistols.

A couple hundred rounds through them were flawless in a G35 Gen3. I then tried them in another G35 Gen4 and experienced the same malfunctions in each mag full. A G23 Gen4 was also tried. Though the malfunctions were not as frequent as with the G35 Gen4's, both malfunctions were occurring on nearly every mag full. I'm wondering if the dual recoil spring of the Gen4's in conjunction with weak mag springs are causing the problems.

Thank you very much! Yes, I have 20 of your 9mm 22 round magazines and have been using a couple in my 9mm AR. They have been flawless. I will trying the springs from those in the .40 mags. If they work, I'll contact Amy for replacement springs. Thank you again.

Understood. Your company has been fantastic to deal with. From the fast responses, to the receptiveness of solving the problem, to Amy offering to include two different types of magazines for me to try, in addition to the springs. Just fantastic customer service! Thank you very, very much.

Does the Pearce G43 +1 mag extension work with the 7 round mag? Thanks

I finally had a chance to try the 22 rounder springs in the 19 round mags. The ammunition was only 115gr. frangible. The mags' capacity were reduced to 18 rounds, however, they were flawless for several mags full each, including support hand only firing. I hope to soon try them with 180gr. FMJ to ensure the heavier bullets don't pose any issues. Thank you again, ETS!

I got a couple of 9rd g 42 mags a few weeks ago.left them fully loaded for 2 days they were flawless locked in easy with 1 in the chamber easy to load after 200 rds no issues.THANKS ETS

OK, as promised I let my ETS 31 mag ride around in my car since January. It has been in temps ranging from 7f to 120f. It has remained fully loaded and bounced around with me everywhere I went. So, yesterday, I was at the range with my G17 and decided to empty the mag. Not quite July 4th but close enough.

1) The mag remained fully loaded. I marked the round on top so I would know if it popped a round while being bumped around. It didn't.
2) The mag seated fully and easily on a closed slide.
3) The mag fed each round from beginning to end without failure.
4) the mag dropped free after the last round with an open slide, bounced on the concrete range floor and then was loaded and fired again without problem.

Not exactly a "torture test" but probably more of a realistic test relative to my likely needs. I will load the mag again. Throw it in the trunk and test it again around X-mas.