KAK Industry K-SPEC Enhanced Bolt Carrier Group 5.56 – Salt Bath Nitride with Desert Chromium

The KAK Industry K-SPEC Enhanced Bolt Carrier Group delivers reliable cycling and corrosion resistance for AR-15 pattern rifles chambered in 5.56 NATO/.223 Remington. This BCG features a dual-finish design with salt bath nitride on the carrier body for hardness and wear resistance, combined with desert chromium plating on critical internal surfaces for smooth operation and extended service life. Designed to replace factory bolt carrier groups, it's a solid upgrade for shooters seeking improved durability without excessive cost.

The carrier body is machined from 8620 steel and finished with salt bath nitride (also known as QPQ or Melonite), providing a self-lubricating surface that resists fouling and simplifies cleaning. The bolt is properly staked, MPI tested, and shot-peened for dimensional consistency. This is a drop-in component for mil-spec AR-15 upper receivers—no fitting or gunsmithing required. Installation requires basic AR-15 armorer knowledge and standard tools.

• Part Type: Bolt Carrier Group
• Compatible Firearms: AR-15 pattern rifles (5.56 NATO/.223 Remington)
• Carrier Material: 8620 Steel
• Finish: Salt Bath Nitride (carrier), Desert Chromium (internal surfaces)
• Installation: Drop-In (basic AR-15 knowledge recommended)
• Includes: Complete bolt carrier group with carrier, bolt, cam pin, firing pin, and retaining pin