There are also the PSA 15 round mags with polymer that doesn’t require changing the mag catch. Unfortunately neither Shield or PSA are as reliable as the good ol oem
THESE SHIELD MAGS ARE PRETTY SOLID AND TAKE THE SINGLE STACKS UP TO 15 ROUNDS. BUT THE AVERAGE HOME INVADOOOR PROBABLY HAS A 50 ROUND STICK WITH A SWITCH AND A CRACK HABIT SO ANYONE WOULD BE FUCKED, EVEN WITH ELITE KIT AND TRAINING https://www.shieldarms.com/shop/sa-s15-nc-gen3-s15-magazine-gen-3-15-round-magazine-for-glock-r-43x-48-7120
Discussion
EITHER WAY, PSA AND SHIELD ARE PRETTY GOOD. MAGAZINE RELIABILITY IS ONLY ONE PART OF A SYSTEM'S OVERALL INTEGRITY AND EASILY MANAGED BY MAINTENANCE AND INSPECTION. IF IN DOUBT, PUT 1K ROUNDS THROUGH A COUPLE DIFFERENT MAGS AND RECORD HOW THEY DO. THAT'S ONLY LIKE 280K SATS FOR 9MM BALL, PRETTY GOOD DEAL FOR VALIDATING ONE'S LIFE SAVING SETUP.