B5 Systems 556 Collapsible Precision Stock AR-15 Stock Mil-Spec Diameter Carbine Receiver Extension Compatible Polymer Black

Overview

The B5 Systems Collapsible Precision Stock (CPS) is designed to fit Mil-Spec carbine receiver extensions (such as M4, A5, and M110K platforms), offering precision ergonomics and consistent cheek welding without the bulk of traditional fixed stocks. Built with a medium profile, it features an adjustable cheekpiece and a non-slip cushioned buttpad with quick-thread precision dials for a customizable fit. Constructed in the USA, the stock incorporates 10 internal tensioners for a secure, wobble-free lock on the receiver extension. It includes a pull-down length-of-pull adjustment lever with an integrated lockout to prevent unintended collapse during use. When fully collapsed, the stock is shortened at the nose to allow single-point sling use and clears the M4 charging handle. For versatile carry and attachment options, it features an ambidextrous steel anti-rotational Quick Disconnect (QD) sling mount, two ambidextrous fixed sling mounts, and an underside M-LOK accessory mounting slot. This model is finished in black with color-matched machined hardware.

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