The Luth-AR 223 Carbine Buffer Spring (brand part number BS-10A) is a replacement recoil spring sized for standard AR-15 carbine buffer tubes chambered in .223 Remington/5.56 NATO. This spring works with the carbine recoil buffer to return the bolt carrier group to battery after each shot, and a worn or weak spring is a common source of short-stroking or failure-to-feed malfunctions. Swapping in a fresh, correctly rated spring is one of the simplest and most affordable ways to restore reliable cycling on a carbine that has seen heavy use. It is a straightforward replacement part for builders assembling a new lower or troubleshooting an existing carbine buffer system.

Key Specifications

• Sized for standard AR-15 carbine buffer tubes.
• Classified as a carbine buffer spring, matched to a carbine-weight recoil buffer.
• Works with .223 Remington/5.56 NATO carbine builds.
• Sold as an individual replacement part, not bundled into a full buffer kit.

Frequently Asked Questions

When should I replace a buffer spring? A worn or weakened spring is a common cause of short-stroking or failure-to-feed issues, so replacing it at the first sign of unreliable cycling is a good practice.

Does this fit a rifle-length buffer tube? No, this spring is sized for a carbine-length AR-15 buffer tube.

What caliber is this spring built for? .223 Remington/5.56 NATO carbine builds.

Buy the Luth-AR 223 Carbine Buffer Spring

Order the Luth-AR 223 carbine buffer spring from our Lubbock, Texas gun shop for fast, insured shipping. See more Luth-AR AR buffer system parts for your build.