Obsidian Tactics™ Phosphate Bolt Carrier Group

Our laser marked bolt carrier groups are sourced from Microbest a tier 1 supplier for DOD and industry. These BCGs feature a corrosion resistant phosphate or hard chrome finish, MIL-SPEC dimensions, Carpenter 158® bolts that have been shot peened, proof tested and magnetic particle inspected. Additionally Obsidian Tactics™ inspects and test fires each BCG for function and gas efficiency.

Features:

• .233 REM/5.56 NATO/.300BLK
• Phosphate or hard chrome finish
• Full Auto M16 cut
• 8620 steel carrier
• 4130 steel gas key
• Properly staked grade 8 gas key screws
• Carpenter 158 steel bolt
• 4140 steel extractor
• MIL-SPEC O-ring
• MIL-SPEC gas rings
• 4140 steel cam pin
• 8740 steel firing pin with hard chrome finish
• Magnetic particle inspected
• Proudly made in the U.S.A.
• Inspected and test fired for gas efficiency by Obsidian Tactics™