5/28/2023 0 Comments Ar adjustable buttstockIt really helps to use a magazine-well vise block. You’ll need to remove the upper receiver first to get to everything in the following steps. The first step is to remove the existing stock from its extension tube. Let’s walk through the upgrade process and hopefully all will become clear.Īs a matter of course, ensure your firearm is empty before proceeding with the instructions after this. This rifle comes with a standard carbine adjustable buttstock, so inside it has a carbine buffer. To explain this a little better and show you how to make changes to your existing configuration, I’m going to add a Lancer Systems Carbon Fiber stock to my Rock River Arms LAR-68 AR-type rifle. Fortunately, when it comes to the buffer insert itself, there are only two lengths: rifle and carbine. Mil-spec tubes are 1.148 inches in diameter while commercial are 1.168 inches. To add insult to confusion, carbine extensions come in two different diameters, mil-spec and commercial. The confusion comes from the fact that there are three lengths of systems: A1 rifle, A2 rifle, and carbine. All four use an extension tube that juts out the back of the receiver and holds the recoil spring and the buffer itself. There are four basic configurations of AR buttstock mounting systems. However, once you know the different sizes of AR stocks, tubes, and buffers, things get much easier. Though replacing the buttstock on an AR-15 appears to be a simple thing, it can actually be just a little bit complicated.
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