LBE Unlimited AR-15 Mil-Spec Buffer Tube Kit Gray
LBE Unlimited
$48.69
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LBE Unlimited
LBE Unlimited AR-15 Mil-Spec Buffer Tube Kit Gray
The LBE Unlimited AR Mil-Spec Buffer Tube Kit in Colt Gray delivers everything you need to complete or restore your AR-15 carbine stock assembly in one convenient, American-made package.
- Complete kit includes buffer tube, castle nut, end plate, buffer, and carbine spring
- Mil-spec diameter buffer tube ensures compatibility with mil-spec carbine stocks
- Six-position adjustable tube allows custom length-of-pull for any shooter
- Durable Colt Gray finish blends seamlessly with standard AR-15 receivers
- Standard carbine recoil buffer and spring provide reliable cycling performance
- 100% US-made components from a trusted name in AR-platform parts
Who This Is For
This kit is ideal for AR-15 builders, gunsmiths, and enthusiasts who need a complete, mil-spec buffer tube assembly without hunting down individual components. Whether you're completing a new build, replacing a worn-out system, or upgrading a commercial-spec setup to mil-spec, this all-in-one kit gets the job done reliably and affordably.
Specifications
| Brand | LBE Unlimited |
|---|---|
| Finish | Colt Gray |
| Buffer Tube Type | Mil-Spec Diameter, 6-Position Carbine |
| Buffer Type | Standard Carbine Recoil Buffer |
| Spring Type | Carbine Length Recoil Spring |
| Kit Includes | Buffer Tube, Castle Nut, End Plate, Buffer, Spring |
| Platform | AR-15 |
| Country of Origin | USA |
Frequently Asked Questions
What is the difference between mil-spec and commercial buffer tubes?
Mil-spec buffer tubes have a slightly smaller outer diameter (approximately 1.148") compared to commercial-spec tubes (approximately 1.168"), and feature a straight profile rather than a slight taper. Mil-spec tubes are generally considered the stronger, more precise standard and are required for use with mil-spec carbine stocks. This LBE kit is mil-spec diameter, so pair it with a mil-spec compatible stock for a proper fit.
Will this buffer tube kit work with any AR-15 lower receiver?
Yes — this kit is designed to fit standard AR-15 mil-spec lower receivers with a standard buffer tube threaded insert. It is compatible with the vast majority of AR-15 lowers on the market. Always confirm your lower receiver accepts a mil-spec buffer tube before ordering, as some budget lowers may use a commercial-spec interface.
Do I need any additional parts to complete my AR-15 stock assembly?
This kit includes all the core components — buffer tube, castle nut, end plate, carbine buffer, and recoil spring — so you only need to add your preferred carbine stock to complete the assembly. A standard armorer's wrench is recommended for proper castle nut torque and staking during installation.
