Reassembling the Bolt Carrier of an AR-15 Rifle

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Part of the video series: Cleaning & Disassembling an AR-15 Rifle

Summary: Learn how to reassemble the bolt carrier of an AR-15 rifle with expert tips and advice on gun care in this free hunting video series on the AR-15 Rifle.

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By Caleb Kelly
eHow Presenter

Caleb Kelly has been working with guns for years and has made his living doing so. He is an expert with handguns and rifles, and works security for a monetary transport company. Caleb...read more

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bloodybucket said

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on 11/6/2009 One point Mr. Kelly did not mention involves the gas rings on the bolt. It is very important to make sure the gaps on these three rings are not lined up when you reassemble your AR-15 or any similar weapon. The charging mechanism uses expelled/expanding gases from the previous round to eject the spent brass; and chamber another round. With the gaps on those rings lined up; it is possible that the lack of pressure will cause miss feeds. I say “possible” because another soldier I and experimented with our rifles on the firing range. We both lined up the gas rings on our M16A2’s and proceeded to fire 30 rounds on semi-automatic and 30 rounds on burst (3 rounds per trigger squeeze). Although mine fired alright on semi, his had multiple problems feeding through that mag. We both had several miss feeds on burst. I imagine the problem would be even worse on models that include a full auto s...

Video Transcript

"Hi, this is Caleb Kelly again. Right now we're going to be reassembling the bolt carrier system for an AR-15 Rifle. First thing you want to do is take your bolt carrier and your bolt, and on a standard AR-15, you want to make sure that the extractor is on the right side, because that's where it pulls the shell and pushes it out. So, make sure it's on the right side and push it into the bolt carrier. You line the hole inside the bolt with the side of the bolt carrier, take the pin that holds it in place, inside the bolt carrier, you put it in, in line with the bolt carrier and then twist it, to where it is perpendicular or running across the bolt carrier. And, you take your firing pin, and you're going to load it in the bottom of the bolt carrier and it should drop all the way down. After that you take the pin that holds the firing pin inside the bolt carrier, you'll put it in through the left side, it'll sit, you just kind of make sure that the firing pin doesn't fall out, or that you don't have any problems. Another little note is that if you stand your bolt carrier on top of your bolt, and it stands and stays fine, then your rings are good. If it falls down just by you putting it on itself, then you're going to need to get new rings. But, that is the reassembly of the bolt carrier."

eHow Article: Reassembling the Bolt Carrier of an AR-15 Rifle