KAK AR15 BCG 5.56/.300 Blackout | Nickel Boron M16 | Optional Engraving

KAK AR15 BCG 5.56/.300 Blackout – Nickel Boron

The KAK AR15 BCG is engineered for shooters who demand reliability, durability, and smooth operation. Designed for use with both 5.56 NATO and .300 Blackout, this AR15 bolt carrier group is built to perform in a wide range of AR platform builds.

Premium Materials and Construction

The carrier is machined from 8620 aircraft-grade steel, properly heat treated, and precision ground for consistent performance. The bolt is manufactured from 9310 steel, shot peened and MPI tested to ensure strength and reliability under demanding conditions.

Nickel Boron Performance

The Nickel Boron (NiB) finish provides enhanced lubricity, corrosion resistance, and easier cleaning compared to standard phosphate finishes. This results in smoother cycling and reduced wear over time.

Enhanced Components for Reliability

• M16 auto profile carrier for reliable cycling
• 8620 steel carrier, precision machined and heat treated
• 9310 steel bolt, shot peened and MPI tested
• Nickel Boron finish with chrome lining
• 8740 steel firing pin, chrome plated
• Enhanced extractor, phosphate coated for durability
• S7 tool steel ejector and retaining pin
• NiB cam pin for reduced friction
• 4130 gas key, precision staked for secure fit
• Grade 8 carrier key screws (T25 drive)

Built for Performance and Reliability

Whether you're building a new rifle or upgrading your current setup, this KAK Nickel Boron BCG delivers the durability, smooth operation, and reliability expected from a high-quality AR15 BCG.