Luth-AR .223 Carbine Buffer Tube Assembly Mil-Spec
Luth-AR
$48.83
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Luth-AR
Luth-AR .223 Carbine Buffer Tube Assembly Mil-Spec
The Luth-AR .223 Carbine Buffer Tube Assembly (Mil-Spec) delivers everything you need to complete or restore your AR-15 stock system in a single, quality-matched kit built to true military specifications.
- Complete kit includes Mil-Spec carbine tube, buffer, spring, end plate, and castle nut
- Mil-Spec diameter tube ensures compatibility with standard Mil-Spec carbine stocks
- .223-rated recoil buffer and spring tuned for reliable 5.56/.223 cycling
- Receiver end plate and castle nut included for a fully finished, secure installation
- Manufactured by Luth-AR, a trusted name in AR-platform components and accessories
- Drop-in ready design simplifies builds, upgrades, and field replacements
Who This Is For
This assembly kit is ideal for AR-15 builders, hobbyists, and owners looking to complete a new build, replace a worn buffer system, or upgrade to a properly spec'd Mil-Spec setup. Whether you're assembling your first rifle or refreshing a well-used carbine, this all-in-one kit eliminates the guesswork of sourcing individually matched components.
Specifications
| Brand | Luth-AR |
|---|---|
| Model | .223 Carbine Buffer Tube Assembly – Mil-Spec |
| Platform | AR-15 |
| Caliber Compatibility | .223 Rem / 5.56 NATO |
| Tube Specification | Mil-Spec Diameter Carbine |
| Kit Contents | Buffer Tube, Recoil Buffer, Recoil Spring, End Plate, Castle Nut |
| Buffer Type | Standard Carbine (.223) |
| Spring Type | Standard Carbine Recoil Spring |
| Finish | Matte / Anodized |
| Country of Origin | USA |
Frequently Asked Questions
Will this buffer tube assembly fit any AR-15 lower receiver?
Yes — this kit is built to Mil-Spec carbine dimensions, which is the most common standard for AR-15 lower receivers. It is compatible with the vast majority of AR-15 lowers on the market. However, if your lower is spec'd for a commercial-diameter buffer tube, this Mil-Spec assembly will not fit. Always verify your lower receiver's buffer tube specification before purchasing.
Is this buffer and spring combination appropriate for both .223 Rem and 5.56 NATO loads?
Yes. The included .223-rated recoil buffer and carbine spring are tuned to function reliably with both .223 Remington and 5.56 NATO ammunition in a standard AR-15 carbine-length gas system. If you are running a non-standard gas system or suppressor, you may want to consider an adjustable or heavier buffer in the future.
Do I need any special tools to install this buffer tube assembly?
Basic AR-15 armorer's tools are recommended for proper installation — specifically a castle nut wrench (armorers' wrench) to torque and stake the castle nut, and a bench block to support the lower receiver. No advanced machining or gunsmithing skills are required, making this kit well-suited for home builds and DIY installations with the right tools on hand.
