just add water ....and maybe a machined lower too. $400 and this is a great way to start you basic AR build by just adding your own 80% machined or preowned version. This kit makes it easy in the the hardest part of building a complete AR is the assembling the upper with the special tools and torque wrench for the barrel nut. This set up look like its a already complete. Even if you have not built before, if you get a lower, with simple tools you can build this up ready for the range in about 2 hours your first time. Watch these videos that give you a set by step process. There are several tools in this video that they tell you to buy, but you really dont "need" them. Although they are good to have, if you have a modest tool kits at home you should be good to go. AR-Stoner Carbine Kit AR-15 5.56x45mm NATO 1 9 Twist 16 Barrel Caution: dont try to build in a room with carpet! Tiny lttle "Things" tend to "fly" and finding them on a carpet is impossible.