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Sionics Weapon Systems AR-15 Mil-Spec Bolt Assembly - HP/MPI Tested
Sionics Weapon Systems AR-15 Mil-Spec Bolt 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.
Spare bolts are recommended regardless, but become even more necessary when shooting high-pressure Mil-Spec ammunition in conjuction with either a suppressor, shorter gas systems, or piston guns (or combinations of those conditions). A Sionics Mil-Spec Bolt Assembly has been properly tested for stress tolerances to help ensure reilable operation. The addition of a Sprinco 5-Coil spring makes for more robust and reliable extraction, crucial if using steel cased ammunition.
- Mil-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
Manufacturer Sionics Weapon Systems Shipping Restriction ITAR/Export Restricted MSRP $69.95 Material Carpenter 158 Steel Material Finish Manganese Phosphate Parkerization Weapon Model AR15/M16 Mil-Spec/Mil Issued Equipment Yes
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