Can I install a rifle-length buffer tube on my AR pistol?

No. Rifle-length buffer tubes are designed for fixed rifle stocks. AR pistols require a pistol buffer tube kit.

Will this kit work with AR-15 pattern clones?

Yes. These buffer tube kits are compatible with most AR-15 lowers and popular clones.

Complete AR-15 Buffer Tube Kits – Mil-Spec & Commercial

Q: How do I know if I need mil-spec or commercial?

Mil-spec buffer tubes fit most modern AR-15 rifles. Check your stock’s diameter or markings if you're unsure.

Q: Is a recoil buffer weight included?

Yes. Every kit includes a matched recoil buffer weight suitable for its tube type.

Complete AR-15 Buffer Tube Kits – Mil-Spec & Commercial

**Deltac AR-15 Mil Spec Buffer Tube Kit with Dual Loop Sling End Plate** $79.92

**ATI AR-15 Mil-Spec Buffer Tube Package** $63.12

**ATI AR-15 Buffer Tube Commercial Package** $66.65

**ATI AR-15 Pistol Buffer Tube Assembly** $63.12

**Timber Creek Carbon Fiber Buffer Tube - Mil-Spec AR-15 Buffer Tube Kit** $71.99

**AR15 Enhanced Carbine Buffer Kit – Kodiak Brown Anodized** $76.99

**Aero AR15 Enhanced Carbine Buffer Kit** $76.99

**Aero AR-10 Enhcd Carb Buffer Kit Kbrn** $104.99

**Aero Ar15 Enhcd Carb Buffer Kit Odg** $76.99

**Aero AR-10 Enhcd Carb Buffer Kit Odg** $104.99

**BCM Milspec Carbine Stock Hardware MOUNTING KIT (Mil-Spec)** $57.95

**CMC Triggers AR-15 Mil-Spec Carbine Buffer Tube Kit – Enhanced QD** $60.27

**Luth-AR Mil-Spec Carbine Buffer Assembly – .223/5.56** $48.83

**Luth-AR 308 Carb Bfr Tube Assembly Mil** $76.60

**Luth-AR .223/5.56 Rifle Buffer Tube Assembly – A2** $47.89

**Luth-AR 308 Rfl/fxd Bfr Tube Assy** $65.75

**Luth-AR 9mm Carbine Buffer Assembly** $51.65

**Armaspec Carb Bff Tube Kit W/ Ep/cn** $35.09

**San Tan Tactical AR-15 Enhanced Buffer Tube Kit | Carbine | 6-Position** $89.00

AR-15 Buffer Tube Kits for Rifle & Pistol Builds

Looking to build or upgrade your AR-15? A complete buffer tube kit ensures your rifle or pistol runs reliably and feels solid in your hands. At Mounts Plus, we stock buffer tube kits for your AR-15 that include everything from the buffer tube itself to the spring, buffer, end plate, and castle nut.

We carry Mil-Spec, commercial, and rifle-length kits—all designed for smooth installation and long-term performance.

Why Builders Trust Our AR-15 Buffer Tube Kits

Fits AR-15 rifles, pistols, and clones
Complete kits: buffer tube, buffer, spring, end plate, castle nut
Mil-Spec, commercial, rifle-length, and pistol options
Tested by home builders, 3-gun shooters, and law enforcement

Instead of piecing together components from different sources, you get a matched kit built for reliability.

Which Buffer Tube Kit Should You Choose?

Mil-Spec AR-15 Buffer Tube Kit

Standard size for most modern AR-15 collapsible stocks

Commercial AR-15 Buffer Tube Kit

Slightly larger diameter, compatible with older commercial-spec stocks

Rifle-Length Buffer Tube Kit

Designed for A2 fixed stocks—choose this for traditional rifle setups

AR-15 Pistol Buffer Tube Kit

Built for AR pistols and stabilizing braces

Still not sure? Mil-Spec works in 90% of cases today.

Looking for AR-15 stocks? Explore our complete selection of AR-15 buttstocks for rifle and pistol builds.
Pair your buffer tube kit with a Mil-Spec AR-15 lower parts kit for a complete build.
For stabilizing brace setups, check out our AR-15 pistol buffer tubes specifically designed for AR pistols.
Upgrade your recoil management with AR-15 recoil springs made for competition and tactical use.

What’s Inside Our Buffer Tube Kits

Every kit ships with:

AR-15 buffer tube (mil-spec, commercial, rifle, or pistol type)
Recoil spring
Recoil buffer weight
End plate
Castle nut

No tools beyond basic AR-15 tools are needed, and no guesswork required.

Frequently Asked Questions

Q: How do I know if I need mil-spec or commercial?
A: Check your stock diameter—mil-spec is slightly smaller. Mil-spec is generally preferred.

Q: Can I install a rifle-length buffer on my AR pistol?
A: No. Rifle-length kits are meant for fixed stocks only. AR pistols require pistol buffer tube kits.

Q: Will this work with AR-15 pattern clones?
A: Yes. These kits are compatible with standard AR-15 lowers and most popular clones.

Q: Is a recoil buffer weight included?
A: Yes. Each kit includes a matched buffer weight for its size and type.

Ready to Upgrade Your AR-15?

Shop now and get fast shipping from Mounts Plus. We stock quality kits from Aero Precision, ATI Outdoors, and other top brands trusted by shooters and builders nationwide.