Sionics NP3 AR Bolt Assembly (HP/MPI)
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
MADE IN USA
NOTE: Carrier, firing pin, cam pin, firing pin retaining pin NOT INCLUDED/SOLD SEPARATELY