LBE Unlimited M16 Complete BCG Nickel Boron 5.56x45mm

The LBE Unlimited M16 Complete Bolt Carrier Group is a factory-specified assembly for AR-platform rifles chambered in 5.56x45mm NATO. It features a Nickel Boron (NiB) coating on the carrier assembly and a 9310 tool steel bolt paired with an 8620 steel carrier. The kit ships with the firing pin, retaining pin, cam pin, extractor, bolt gas rings and a staked gas key for durability. This BCG is full-auto rated and intended as a direct replacement or serviceable spare for compatible AR receivers.

Key Specifications

• The caliber is 5.56x45mm NATO.
• The finish is Nickel Boron.
• The bolt material is 9310 tool steel.
• The carrier material is 8620 steel.
• The action rating is Full Auto.
• The bolt type is Drop In.
• Included components are firing pin, retaining pin, cam pin, extractor, and bolt gas rings.
• The gas key is staked.
• The listed color/appearance is Silver.
• Manufacture origin is Made in the USA.

Purpose-built for shooters and armorers who prioritize proven components and straightforward serviceability, this complete NiB BCG offers corrosion resistance and simplified maintenance compared with bare finishes. With the essential pins and rings included and materials specified for high-stress components, it is suited for use wherever a factory-style bolt carrier group is required for AR-platform rifles chambered in 5.56x45mm NATO.