Luth-AR .308 Carbine Buffer Spring – AR-10/LR-308 Pattern Rifles

The Luth-AR .308 Carbine Buffer Spring is engineered for AR-10 and LR-308 pattern rifles with carbine-length buffer tubes. This spring manages the heavier bolt carrier and buffer mass required for .308 Winchester/7.62×51mm operation, providing reliable cycling with factory and defensive ammunition. It's a replacement component for worn springs or an upgrade for builders assembling .308 carbine platforms.

Made from heat-treated steel wire with a corrosion-resistant finish, this spring is designed to maintain proper tension over extended use. Installation is drop-in for shooters familiar with AR-platform disassembly—no gunsmithing required. Fits all mil-spec carbine buffer tubes on large-frame AR rifles.

• Part Type: Buffer Spring
• Compatible Firearms: AR-10, LR-308, and large-frame AR rifles with carbine-length buffer tubes
• Material: Heat-treated steel wire
• Finish: Corrosion-resistant coating
• Installation: Drop-In
• Includes: One (1) .308 carbine buffer spring