Luth-AR Complete BCG – LR-308/AR-10 Pattern Rifles

This Luth-AR complete bolt carrier group is engineered for reliable cycling in LR-308 and AR-10 pattern rifles chambered in .308 Winchester/7.62x51mm NATO. Manufactured to mil-spec dimensions, this BCG provides a direct replacement for worn or damaged factory bolt assemblies, restoring proper function and feeding reliability. Shooters building a large-frame AR or replacing a failing BCG will appreciate the quality machining and proper staking on this assembly.

The carrier is constructed from 8620 steel with a phosphate finish for corrosion resistance and reduced friction. The bolt is machined from 9310 steel and properly heat-treated to withstand the higher chamber pressures of .308 cartridges. Gas key is secured with grade 8 fasteners and staked per military specifications. This is a drop-in component for standard LR-308/AR-10 pattern upper receivers—no gunsmithing required, though basic familiarity with AR disassembly is recommended.

• Part Type: Complete Bolt Carrier Group
• Compatible Firearms: LR-308, AR-10 pattern rifles (.308 Win/7.62 NATO)
• Carrier Material: 8620 steel
• Bolt Material: 9310 steel
• Finish: Phosphate
• Gas Key: Properly staked, mil-spec
• Installation: Drop-in
• Includes: Complete bolt carrier group (carrier, bolt, cam pin, firing pin, retaining pin)