This is a Adaptive Tactical Stock known as the EX Performance, model 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.
Features:
Ideal upgrade for your AR15 or AR10
M4-style stock with adjustable length-of-pull
Compatible with Mil-Spec sized extension tubes
Sleek design