How to Reassemble an AR-15 Rifle

"Hi, this is Caleb Kelly again, and we are going to be reassembling the AR-15 rifle. What you do, you take your upper half, is what it's called, and this is the barrel assembly and the upper receiver. You take your charging handle, slide it in the big slot, and it has notches on the inside, which it will catch on, and then you'll pull it up into where it rests. After that, you take your bolt carrier, and it's important to remember that when you're trying to assemble this, make sure that your bolt is forward, because the pin that holds the bolt in the bolt carrier will block it's access into the receiver. So, bolt forward, slide it underneath the charging handle and then push all of that inside the upper receiver. After that, you take the lower half, which involves, it includes the lower receiver and the stock, pistol grip, and trigger assembly. You place the upper half on it and you push the pins that hold it together. You'll push those in securing both receivers. That is reassembly of the AR-15 series rifle."