You can find the Magpul CTR Carbine Stock Mil-Spec Flat Dark Earth here.

The Magpul CTR (Compact/Type Restricted) Stock is a lightweight, streamlined A-frame profile AR-15 buttstock designed to avoid snagging on the shooter's equipment or environment. The design shields the release latch to prevent accidental activation. The CTR also features a supplemental friction lock system that, when engaged, minimizes stock movement for enhanced weapon stability as well as an ambidextrous QD sling mount that will accept any push-button sling swivel.

The Mil-Spec Model includes a standard 0.30" rubber buttpad, which provides a positive, anti-slip surface even with body armor or modular gear.

Features:

• Mounts on mil-spec sized carbine receiver extension tube (not included) from manufacturers such as Colt, LMT, Ruger, S&W, SIG, and others.
• Supplemental friction lock minimizes stock movement.
• Sloping cheek weld combines a slim profile with user comfort.
• Shielded release latch prevents snagging and accidental operation.
• Premium chrome-silicon lock spring provides positive locking and long service life.
• Side mounting slots accept optional cheek risers for NON-AR15/M16 applications.
• Removable 0.30" Rubber Butt-Pad offers an anti-slip surface and increases impact protection.
• Compatible with Magpul ASAP and other receiver-mount sling attachments
• Sling Mounts: Rear - Push-button QD swivel sling mount accommodates up to 1.5" swivels (ambidextrous), Rear/Bottom - 1.25" sling loops, and Toe - Lanyard hole for custom para-cord rigs

Specifications:

• Color: Flat Dark Earth
• CTR, Mil-Spec (stock configuration)
• Weight: 0.55 lb.
• Weight, w/ Rec. Extension: 0.80 lb.
• Length, Maximum: 6.9 in.
• LOP Adjustment Range: 3.25 in.
• LOP, M4 Collapsed: 10.70 in.
• LOP, M4 Extended: 13.95 in.