SV Precision Black is the hardest, most wear resistant and smoothest bolt carrier group coating available. Created from a highly advance Chemical Vapor Deposition (CVD) technology that produces a flexible pure form of amorphous carbon, consisting of sp3 bonded carbon atoms. Having the surface characteristic of both lipophilic and hydrophobic makes it non wettable with water but easily wet with oil; a characteristic found in few bolt carrier group coatings. This technology produces excellent tribological properties that make it very suitable in environments with extreme contact pressure and sliding actions. When you choose Black, you are choosing the lowest coefficient of friction coating on the market today requiring minimal to no lubrication. In addition, Black is a chemically inert coating that reduces carbon build-up. This top-of-the-line bolt carrier group coating will enhance performance and precision due to a much smoother sliding action while also displaying a sleek external appearance.


  • Coefficient of Friction: 0.01
  • Hardness: 3000 Vickers
  • Max Temperature: 1,100° F
  • Thickness: 2-3 microns
  • Color: High Luster Black


  • Increased Lubricity
  • Wear Resistant
  • Smoother Recoil
  • Improved Consistency
  • Faster Cyclic Rate
  • Easier Cleaning
  • Reduced Carbon Fouling

SV PRECISION Black Lightweight .223/556/300 AAC Blackout BCG


SV Precision BCG for AR15, M16, or M4 compatible with semi and full auto versions. Carrier is machined from Mil-Spec 8620 tool steel with shrouded firing pin and Mil-Spec chrome lined interior. SV Precision BCG includes the Mil-Spec chrome lined and heat treated gas key. Gas key is sealed then secured to carrier with Grade 8 fasteners and properly staked per Mil-Specs. This ensures proper gas system functioning. The bolt assembly is CNC machined from Mil-Spec Carpenter No. 158® steel then shot peened for increased strength per Mil-Spec; includes tool steel extractor with Wolff spring, viton O-ring , black insert; tool steel ejector pin spring; firing pin chromed finished with firing pin retaining pin and cam pin.
Total weight completely assembled 8.2oz.
HPT (High Pressure Tested) and MPI (Magnetic Particle Inspected).

Complete Mil-Spec Bolt Carrier with Bolt Assembly HPT/MPI Tested:

Mil-Spec CNC Machined from 8620 Tool Steel case hardened to 58 – 60 rockwell with chrome lined interior
Mil- Spec Chrome Lined Gas Key
Key Staked with Grade 8 Screws, per Mil-Spec
Mil-Spec Carpenter 158® Bolt
Mil-Spec Ejector w/ Spring
Mil-Spec Extractor w/ Wolff Spring, viton O-ring and insert
Mil-Spec Firing Pin w/ Chrome Finish
Mil-Spec Cam Pin

5.56 BCG Weight – 8.2oz.

SKU: SVP-BLW-556-BCG Categories: , ,


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