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Sionics NP3 AR Bolt Assembly (HP/MPI)


Out of Stock

Product Description

YES, NP3 is better than NiB... 

With the NP3 coating, this bolt reduces friction in all wear points and cleans up with a rag. This is our favorite bolt on the market. 

Sionics bolts assemblies are manufactured from Carpenter 158® Steel. Each bolt is shot peened and comes with a Sprinco heavy extractor spring, and black spring insert. Every bolt is 100% High Pressure tested and Magnetic Particle inspected.


  • Mils-Spec Carpenter No.158® Steel
  • HPT Bolt (High Pressure Test / Proof)
  • MPI Bolt (Magnetic Particle Inspected)
  • Shot Peened Bolt
  • Tool Steel Extractor
  • Sprinco 5-Coil Heavy Duty Extractor Spring
  • Black Extractor Insert
  • The bolt body, extractor, and ejector are coated with NP3.
  • Gas Rings Installed 


NOTE: Carrier, firing pin, cam pin, firing pin retaining pin NOT INCLUDED/SOLD SEPARATELY 

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