I use Blackhawks Speed Clips to mount all my molle gear, and I used all sizes #3, #5, #7, and #9. All sized speed clips hold my gear nice and tight and can hold a lot of weight. I used 2 #3 Speed Clips to hold a 10 round 50 Cal mag pouch before and it had no problem doing the job, as well as a 200 round Saw pouch these things are tough. With speed clips it makes it easy to switch out your gear to other layout so you can get the job done.
Pros: Good Price, Easy to mount or change mount layouts.
Cons: NONE
This review was written in the old system and had content requirements that are different than reviews written today.