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A completely assembled, ready to install AR-15 bolt carrier system utilizing FailZero’s proprietary Exo-treatement. This self-lubricating surface eliminates the need to apply oil or grease that can attract dirt, dust and unburned powder while making cleaning easier, and offering 40% more wear resistance than chrome plating.
Semi-Auto pattern. All FailZero bolts are MPI tested and live fire tested.
- Case Hardened, Shot Peened and MPI Bolt (Magnetic Particle Inspected)
- EXO Coated Bolt (40% more wear resistant than Chrome with a very Low Coefficient of Friction)
- Mil-Spec Gas Rings
- EXO Coated Carrier
- Gas Key with EXO Coated exterior, Chrome Lined ID
- Gas Key Hardened to USGI Specifications
- Grade 8 Hardened Fasteners
- Black Extractor Insert
- Mil-Spec Staked Gas Key
- Firing Pin and retainer
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