The metal loops exclude the use of the shoulder strap attached to a blaster (incessant rattle and wear of plastic on which they rub) and the shoulder strap is too long, even for an adult and set to the shortest. The use of single shoulder suffers from the misguided bracket locations chargers and darts: when setting the loops to a belt loop, one is with shippers on the shoulder. And if you properly instead chargers and darts, loops fall on the scapula, and shoulder turn as soon as you move. I do not recommend this product, only saved by both shippers and 24 darts provided.
Edit April 17, 2015 I just found how to use the shoulder strap: belt. By attaching carabiners passers pants and playing on the shoulder strap length adjustment, we can have three of the four chargers and twelve darts at hand. There remains the problem of chargers 6 Darts, too compressed spring which tends to spontaneously eject its content, but the shoulder strap allows you to carry chargers 12 or 18, so ... Come on, a third star!
