RISE Armament AR-15 Bolt Carrier Group | 5.56 NATO / .223 | Black Nitride

RISE Armament AR-15 Bolt Carrier Group | 5.56 NATO / .223 | Black Nitride

The RISE Armament AR-15 Bolt Carrier Group in Black Nitride is a complete bolt carrier assembly engineered for dependable operation in AR-15 rifles chambered for 5.56 NATO and .223 Remington. Featuring a durable nitride-treated finish and precision-machined internal components, this BCG is built to deliver reliable cycling, strong wear resistance, and straightforward long-term maintenance across a wide range of rifle configurations.

The carrier is machined from 8620 steel and undergoes heat treatment and case hardening to support long-term durability under repeated firing cycles. The bolt itself is manufactured from 9310 steel and individually MPI tested to verify structural integrity before final assembly. RISE Armament also incorporates a shot-peened extractor and a hardened 4140 steel cam pin to support consistent extraction and dependable bolt movement during operation.

The Black Nitride finish provides enhanced surface hardness and corrosion resistance while maintaining a smooth operating surface inside the upper receiver. Nitride-treated components are widely valued for their ability to resist wear and simplify routine cleanup without the reflective appearance associated with some plated finishes. The finish also supports lubricity and smooth cycling characteristics while maintaining a clean, understated appearance for both factory rifles and custom AR-15 builds.

This bolt carrier group utilizes a full-auto profile carrier compatible with standard AR-15 upper receiver assemblies. The properly staked gas key uses hardened grade 8 fasteners to help maintain reliable gas system function under sustained use. As a fully assembled unit, the RISE Armament Black Nitride BCG is ready for installation in compatible rifles chambered in 5.56 NATO, .223 Remington, and many .300 Blackout platforms that utilize a standard AR-15 carrier system.

Whether used as a replacement component, a spare assembly, or part of a new rifle build, the RISE Armament AR-15 Black Nitride Bolt Carrier Group combines proven materials, individually tested components, and a durable surface treatment in a streamlined package designed for recreational shooting, training applications, and general-purpose rifle setups.

• Compatible with AR-15 rifles chambered in 5.56 NATO and .223 Remington
• Black Nitride finish for corrosion resistance and surface durability
• Full-auto profile carrier design
• 9310 steel bolt with individual MPI testing
• 8620 steel carrier with heat-treated construction
• Properly staked gas key with hardened grade 8 fasteners
• 4140 steel cam pin
• Shot-peened extractor
• Complete assembled bolt carrier group
• Approximate weight: 11.6 oz.
• Made in the USA