The new ATI TactLite AR stocks. The standard model is on the left and adjustable comb model on the right. You might have noticed that most adjustable butt stocks for AR-type rifles shake just a little. Worse yet, the farther you move that adjustable stock back, the more the shake. We’ve probably learned just to accept it, kind of like that “sproing” sound that many ARs used to make when fired.

While the movement of the stock on the buffer tube is not a desired design feature, there’s actually a reason it happens. Here’s why. Most stock pieces are made of polymer …read more

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