ETS Glock Mag Drop Test

In this video I drop an ETS 31round 9mm mag (designed for Glock pistols) that is fully loaded with 147grain ammo. I drop it several times onto concrete. The only damage is a small deformed area at the upper front portion of the mag. After the test, I inserted the mag into my Glock 17L. The mag inserted and locked in correctly, with no issue. I handcycled some rounds, again with no issues. I then filed off the protruding lip, just to eliminate any possibilities of issues in a different gun.