The Luth-AR 223 Carbine Buffer Spring is a dedicated AR-15 carbine action spring engineered to keep your rifle running smoothly. Built with precise manufacturing and durable construction, this spring is tuned for .223 Remington and 5.56 NATO carbines using a standard carbine-length receiver extension and collapsible buttstock.

This buffer spring is ideal for refreshing a well-used carbine, completing a new lower build, or keeping a critical spare on hand. Its consistent spring rate supports reliable cycling, clean feeding, and positive bolt lockup during extended range sessions, training, or general-purpose use. Luth-AR’s focus on long-term reliability and solid build quality makes this component a dependable choice for maintaining your AR-15.

Key Features:

• Manufacturer: Luth-AR
• Model: Carbine Buffer Spring .223/5.56 NATO
• Type: Buffer Spring
• Platform Compatibility: AR-15 / M4 Carbine
• Caliber Compatibility: .223 Remington / 5.56 NATO
• Receiver Extension Compatibility: Carbine-Length Receiver Extension