I'd heard some 50/50 things about them online, but worth a shot to try out, already have 3 OEM ones.
First thing they loaded like crap. One the first one, it jammed and I couldn't load more then 9rds in. I tried using the Glock speedloader and when you pressed the back of the round the nose of the bullet would go stay up and the rear of the casing would go down. So I took the mag apart and bent the spring slightly so the pressure would be a little bit more even. Then I reloaded it, this time it took all 15rds but was difficult to load towards the end. Was still binding a little.
I shot these yesterday. So far only 45rds through each mag but working well so far, both fed through just fine.
Here is a side by side picture comparison of the two magazines.
KCI left Glock Right
KCI bottom, Glock top

KCI left , Glock right
KCI Bottom Glock Top
Glock left KCI right
Glock left KCI Right
Glock top, KCI bottom
Glock
KCI
KCI left Glock Right














