Awesome dart holder that will give you the edge in any nerfwar. Darts are kept tight and are easily removed when needed. The dart holder is attached tightly to the tactical rail but slides off easily if you change guns. The holder comes in 3 different models, either for 6, 8 or 10 darts, depending on how much ammo you need :). Please be aware that the 8- or 10-dart version does not fit on every gun, as the tactical rail on that gun might be to small or harder to reach. The 6-Dart holder always works, check images to see what holder I used on my collection. Also, you will need 4 screws to make it happen. Ideally, you would want to use M2.6x8mm Phillips Drive Flat Head Self-Tap Electronic Screws. If screws are not exactly your strong suit and there is no handyman nearby, I recommend using really, really small and short screws. Depending on where you live, you can use screws from your computer, you know, the ones holding your hard drive and your mainboard in place. The holder is pretty forgiving if your screws are slightly too small or big, so search your house. Every holder has a little arrow thingy next to one side (where the screws are) This is the side that goes front first on the holder. Okay then, go and impress your friendsYou will have to print the body and the clips file once each. A 6-dart body will only fit with a 6-dart clips file, so make sure you have the right ones. Also, you will need 4 screws to make it happen. Ideally, you would want to use M2.6x8mm Phillips Drive Flat Head Self-Tap Electronic Screws. If screws are not exactly your strongsuit and there is no handyman nearby, I recommend using really, really small and short screws. Depending on where you live, you can use screws from your computer, you know, the ones holding your hard drive and your mainboard in place. The holder is pretty forgiving if your screws are slightly too small or big, so search your house.