Luth-AR Mil-Spec AR-15 Buffer Tube Kit
Whether you’re replacing a commercial AR-15 buffer tube or starting a new build, it pays to have a quality, US-made recoil assembly. This buffer tube kit from Luth-AR comes with a mil-spec buffer tube for stock compatibility, a 3.2 oz. carbine buffer, buffer spring, castle nut, and endplate. This has everything you need to finish off the back end of your AR-15 lower receiver.
Includes
- Mil-Spec Carbine Tube
- .223/5.56 buffer spring
- .223/5.56 carbine buffer
- Latch Plate and Lock Ring
Specifications
- Buffer Tube Material: 6061-T6 Aluminum
- Buffer Tube Finish: Hardcoat anodized
- Buffer Weight: 3.2 oz.
Not sure if you need Mil-spec or commercial buffer tube? The below image shows the difference in dimensions. For more information, please read our article, “Mil-Spec vs. Commercial AR 15 Buffer Tubes – Which One is Better?“.


























