The LBE Unlimited MIL-SPEC AR-15/M4 6-position stock kit gives you a complete, no-hassle assembly solution for setting up or upgrading your AR platform rifle. This domestic-made package includes everything you need to replace or install a proper mil-spec buffer tube and buttstock: a classic M4-style adjustable buttstock, a six-position mil-spec buffer tube, carbine-length recoil spring, standard carbine recoil buffer, receiver end plate, and castle nut. Whether you're building a new rifle, swapping out worn components, or refining the ergonomics of an existing gun, having all the pieces in one kit saves trips and headaches.

LBE Unlimited has built a solid reputation for producing US-made AR parts that work. This stock kit maintains that standard—straightforward design, mil-spec dimensions, and domestic manufacturing. The six-position adjustable buttstock lets you dial in length of pull to your frame, shooting position, or gear setup, a practical feature whether you're running it on a defensive rifle, a match gun, or a hunting AR.

If you're assembling an AR-15 or M4-pattern rifle from a stripped lower or upper, or you need to replace a worn buffer system, this kit handles the job without forcing you to source parts piecemeal. The included castle nut and end plate mean everything you need is accounted for.

Key Features

• Complete mil-spec buffer tube and stock assembly in one kit
• M4-style buttstock with 6-position adjustability for custom length of pull
• Carbine-length recoil spring and standard carbine buffer included
• Receiver end plate and castle nut for full installation
• Made in the USA
• Black synthetic construction

Specifications

Brand	LBE Unlimited
Product Type	AR-15/M4 Stock Assembly Kit
Stock Style	M4-Style Adjustable Buttstock
Positions	6-Position
Buffer Tube	Mil-Spec
Recoil Spring	Carbine-Length
Recoil Buffer	Standard Carbine
Included Components	Buttstock, Buffer Tube, Recoil Spring, Recoil Buffer, Receiver End Plate, Castle Nut
Material	Black Synthetic
Country of Origin	USA

Frequently Asked Questions

What's included in this stock kit?

The kit includes a six-position M4-style adjustable buttstock, a mil-spec buffer tube, carbine-length recoil spring, standard carbine recoil buffer, receiver end plate, and castle nut—everything needed to assemble or upgrade a complete buffer system on an AR-15 or M4-pattern rifle.

Is this kit compatible with AR-15 and M4 platforms?

Yes. This is a mil-spec kit designed to work with standard AR-15 and M4-pattern rifles that accept mil-spec buffer tubes and components.

Can I adjust the length of pull?

Yes. The M4-style buttstock offers six positions, allowing you to adjust the length of pull to fit your body, shooting stance, or gear configuration.

Is this domestically manufactured?

Yes. LBE Unlimited manufactures this kit in the USA.