LBE Unlimited AR-15 Mil-Spec Buffer Tube Kit Black
LBE Unlimited
$48.69
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LBE Unlimited
LBE Unlimited AR-15 Mil-Spec Buffer Tube Kit Black
The LBE Unlimited AR Mil-Spec Buffer Tube Kit gives you everything needed to complete or restore your AR-15 carbine stock assembly with confidence, using 100% American-made components built to military specifications.
- Six-position mil-spec diameter buffer tube fits standard carbine stocks
- Includes carbine-length recoil spring for reliable cycling performance
- Standard carbine recoil buffer absorbs felt recoil and protects internals
- Receiver end plate and castle nut included for a complete install
- Manufactured in the USA to mil-spec tolerances for lasting durability
- Drop-in compatible with mil-spec AR-15 lower receivers and carbine stocks
Who This Is For
This kit is ideal for AR-15 builders completing a new lower receiver build, shooters replacing worn or damaged buffer components, or anyone upgrading from a commercial-spec tube to a true mil-spec fitment. It's a smart, cost-effective solution for gunsmiths and DIY enthusiasts who want a dependable all-in-one buffer kit without sourcing parts separately.
Specifications
| Brand | LBE Unlimited |
|---|---|
| Buffer Tube Type | Mil-Spec Diameter, Six-Position |
| Platform | AR-15 Carbine |
| Recoil Spring | Carbine Length |
| Buffer Type | Standard Carbine |
| Includes | Buffer Tube, Recoil Spring, Buffer, End Plate, Castle Nut |
| Finish | Black |
| Country of Origin | Made in the USA |
| Compatibility | Mil-Spec AR-15 Lower Receivers |
Frequently Asked Questions
What is the difference between mil-spec and commercial-spec 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 at the rear. This LBE kit uses a true mil-spec diameter tube, which is compatible with mil-spec carbine stocks. Commercial-spec stocks will not fit properly on a mil-spec tube, so be sure your stock matches before purchasing.
Is this kit compatible with pistol-configuration AR builds?
This kit is designed for standard carbine-length AR-15 rifle builds with a traditional stock. For AR pistol configurations, you would typically need a pistol buffer tube (also called an "arm brace tube"), which is shorter and does not have stock-retention positions. This six-position tube is intended for use with a rifle stock on a standard lower receiver.
Do I need any special tools to install this buffer tube kit?
Installation requires an armorer's wrench or castle nut wrench to properly torque and stake the castle nut, as well as a receiver vise block to safely secure your lower receiver during assembly. The components thread directly onto a standard AR-15 lower receiver's buffer tube extension threads. Proper staking of the castle nut is recommended to prevent loosening under recoil during use.
