The Luth-AR M4 Collapsible Buttstock (Luth-AR part no. BSM4KM) brings a familiar M4-pattern silhouette to any AR-15 build running a standard mil-spec or commercial carbine buffer tube. Luth-AR molds the stock from reinforced polymer, giving it enough toughness for hard range use without piling on extra weight at the rear of the rifle. A built-in rear sling swivel stud provides a dedicated, low-profile mounting point for a two-point sling, so there’s no need to add a separate QD adapter. It’s a straightforward upgrade for anyone replacing a worn or damaged factory stock, building a home-defense carbine, or finishing out a budget-minded AR-15.

Key Specifications

• Collapsible M4-pattern design that adjusts along a standard carbine buffer tube to set length of pull.
• Compatible with mil-spec and commercial-diameter buffer tubes, covering the two most common AR-15 tube standards.
• Built-in rear sling swivel stud gives a dedicated attachment point for a two-point sling.
• Constructed from reinforced polymer for durability without excess added weight.
• Multi-position adjustment lets shooters dial in length of pull for different shooters or gear loadouts.
• Drop-in fit makes it a fast, tool-light stock swap on any standard AR-15 lower.

Frequently Asked Questions

Will this fit my AR-15 buffer tube? Yes, it’s built for standard mil-spec and commercial-diameter carbine buffer tubes used on AR-15 platform rifles.

Does it include a sling attachment point? Yes, a rear sling swivel stud is molded into the stock body for a two-point sling.

What is it made from? Reinforced polymer, chosen for durability without adding unnecessary weight to the rear of the rifle.

Buy the Luth-AR M4 Collapsible Buttstock with Rear Sling Swivel

Order it from our Lubbock, Texas gun shop for fast, insured direct shipping. It’s an easy way to refresh your AR-15 stock and forend setup without touching anything else on your lower.