This was a thoroughly challenging project with the requirements for the end result being durable, lightweight, ergonomic, and reliable.
This is obviously not the complete test but its enough to show that the extension functions reliably in feeding the glock 19 out of the glock 17 mag.
Ill spare you the lengthy detail but the video is the final set of drop tests on the final version of the print. In summary drop testing destroyed 10 different versions of the print resulting in the video you see above. On the 12th drop when the whole thing comes apart. Its not the extension that failed; it was the locking lips on the bottom of the magazine.
This is an AD