Lewis Machine and Tool Enhanced 5.56 AR-15 Bolt Carrier Group - Nickel Boron / Phosphate

The LMT Full-Auto 5.56 Enhanced Bolt Carrier Group delivers reliable performance for demanding conditions. It features LMT's proprietary Enhanced Bolt, crafted from a robust, easy-to-clean material with reworked locking lugs for improved resilience in high-pressure or overgassed systems.

Features:

• Full-auto bolt carrier group
• Chambered in 5.56
• LMT Enhanced Bolt design, Nickel Boron finish
• Manganese phosphate carrier finish
• Improved locking lugs
• "Lobster Tail" extractor with dual springs
• Precision machined and heat treated
• Magnetic particle inspected, shot peened

The unique "lobster tail" extractor with dual springs ensures consistent extraction and extended spring life, and the full-auto rated carrier adds mass for optimized gas flow, reduced carrier tilt, and consistent cycling, especially in suppressed or rapid-fire setups.

Lewis Machine and Tool Company was founded in 1980 to provide the US Military, law enforcement, and government agencies with precision-engineered, high-quality weapons, components, and modular weapon systems.