*CONTACT US FOR A SPECIAL COUPON CODE!*
KAK Industry AR-15 BCG – 5.56 / .300 BLK – Full Hard Chrome
The KAK Industry Full Hard Chrome BCG (425-0505-001) is a premium, duty-grade bolt carrier group designed for shooters who prioritize extreme reliability and ease of maintenance. Unlike standard phosphate-coated groups, this BCG features a complete hard chrome finish—inside and out—on the carrier, bolt, gas key, and cam pin. Chrome is naturally smoother and harder than other finishes, providing a lower coefficient of friction that allows the rifle to cycle more reliably with less lubrication and makes carbon buildup effortless to wipe away.
Built to exceed MIL-SPEC requirements, the bolt is machined from 9310 Steel (which is significantly stronger than C158 when properly heat-treated) and is Shot Peened and Magnetic Particle Inspected (MPI) to ensure no surface fractures exist. The carrier is a full-auto profile, machined from 8620 steel, providing the necessary mass for reliable cycling in both suppressed and unsuppressed configurations. With a properly staked gas key and a hard chrome finish that mimics the original "Eugene Stoner" design specifications, this KAK BCG is a top-tier choice for any hard-use 5.56 NATO or .300 Blackout build.
Includes: Complete Bolt Carrier Group (Carrier, Bolt, Firing Pin, Cam Pin, and Gas Key).
Key Features
- Full Hard Chrome Finish: Provides superior corrosion resistance, extreme surface hardness, and a slick surface that resists carbon fouling.
- 9310 Steel Bolt: Precision-machined, heat-treated, shot-peened, and MPI tested for maximum service life and durability.
- M16 / Full-Auto Profile: Offers increased mass for more consistent timing and improved reliability in various gas systems.
- Properly Staked Gas Key: Grade 8 hardware is used and staked to MIL-SPEC standards to prevent any movement during high-volume fire.
- Chrome Lined Reliability: Since the entire unit is chromed, the gas path is exceptionally smooth, aiding in consistent gas pressure.
- Easy Maintenance: The "slick" nature of hard chrome allows users to clean the bolt with a simple wipe-down, often without the need for harsh solvents.
Product Specifications
- Brand: KAK Industry
- Model: Full Hard Chrome BCG
- Caliber Compatibility: 5.56 NATO, .223 Rem, .300 Blackout, .25-45 Sharps
- Bolt Material: 9310 Steel (MPI Tested)
- Carrier Material: 8620 Steel (Full-Auto Profile)
- Finish: Hard Chrome (Full)
- Extractor: Phosphate Extractor w/ 5-Coil Spring & Crane O-Ring
- Weight: 0.72 lbs (11.5 oz)
- MPN: 425-0505-001
- UPC: 811163035064
