Screws arent long enough - Magpul Industries MagLink Coupler PMAG 30/40 AR/M4

The fact you can couple two magazines together of course is badass. But when i put the magazines in the coupler properly, i screwed the screws all the way in and let go. The two pieces of the coupler fell apart. The screws werent long enough. I went to lowes and picked up two three inch screws that worked perfectly. Really annoyed something like this would happen with a company like Magpul.