Luth-AR .308 Carbine Buffer Tube Assembly Mil-Spec
Luth-AR
$93.05
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Luth-AR
Luth-AR .308 Carbine Buffer Tube Assembly Mil-Spec
The Luth-AR .308 Mil-Spec Carbine Buffer Tube Complete Assembly delivers everything you need to build or restore a reliable, properly functioning AR-10 platform in a single, well-matched kit.
- Complete kit designed specifically for AR-10 and .308 semi-automatic rifles
- Mil-Spec diameter carbine buffer tube ensures consistent, standard fitment
- Included .308 carbine buffer absorbs the heavier recoil impulse of .308 Win
- Matched carbine recoil spring optimized for .308 bolt carrier group cycling
- Receiver end plate and castle nut included for a fully complete installation
- Luth-AR quality construction engineered for long-term durability and reliability
Who This Is For
This assembly kit is ideal for AR-10 builders, gunsmiths, and rifle owners who need a complete, correctly spec'd buffer system without piecing together individual components. Whether you're completing a new .308 build, replacing worn parts, or upgrading a stock buffer system, this Luth-AR kit provides a trusted, all-in-one solution that takes the guesswork out of parts compatibility.
Specifications
| Brand | Luth-AR |
|---|---|
| Compatible Platform | AR-10 / .308 Semi-Automatic Rifles |
| Tube Specification | Mil-Spec Diameter Carbine |
| Buffer Type | .308 Carbine Recoil Buffer |
| Spring Type | .308 Carbine Recoil Spring |
| Kit Contents | Buffer tube, buffer, spring, end plate, castle nut |
| Finish | Anodized Aluminum |
| Country of Origin | USA |
Frequently Asked Questions
Will this buffer tube assembly fit any AR-10 or .308 rifle?
This kit is designed to fit AR-10 pattern rifles that accept a standard Mil-Spec carbine buffer tube. Most AR-10 builds using a standard lower receiver will be compatible; however, always verify your lower receiver's buffer tube specifications before purchasing, as some proprietary designs may differ from Mil-Spec dimensions.
Why do I need a .308-specific buffer and spring rather than a standard AR-15 buffer system?
The .308 Winchester cartridge generates significantly more energy and bolt carrier velocity than the 5.56/.223 round. A standard AR-15 buffer and spring are not heavy or stiff enough to properly manage this increased recoil impulse, which can lead to malfunctions or accelerated wear. The .308-specific buffer and spring in this kit are tuned to the heavier bolt carrier groups used in AR-10 platforms, ensuring reliable cycling and a longer service life.
Do I need any special tools to install this buffer tube assembly?
Installation requires an armorer's wrench to properly torque and stake the castle nut onto the receiver end plate, as well as a vise block to secure the lower receiver during assembly. These are standard AR platform gunsmithing tools. It is recommended to stake the castle nut after torqueing to prevent loosening under recoil — a step that ensures long-term reliability of your build.
