Adaptive Tactical EX Performance Stock, Fits AR-10/15 Rifles, Black AT-02012 The Adaptive Tactical EX Performance adjustable M-4 Style stock for AR15/AR10 Carbines with its advanced design and high-impact polymer construction make it the ideal upgrade for your AR15 or AR10. The EX Performance M4-style Stock features an easy-to-reach rapid adjust lever for custom length-of-pull" and includes an integrated QD swivel attachment and molded in non-rust standard sling swivel attachment. Durable polymer construction with non-slip vented rubber recoil pad" oversized extra strength adjustment pin and sleek industrial design.