Description:

A Nickel Boron coated bolt for your AR-15. Works with 5.56MM, .223, and 300BLK (Blackout) cartridges. High quality 9310 steel bolt. Tight piston rings for correct function and virtually no gas leakage. MPI tested bolt. A pristine and reliable bolt for your AR-15 rifle!

Advantages of Nickel Boron:

Nickel Boron coatings are columnar in growth resulting in a distinct nodular topography which serves to reduce surface to surface contact of two mating / sliding surfaces reducing drag / friction. The nodular structure dissipates heat at greater efficiency due to greater surface area.

• Harder surface results in less wear
• Reduced Friction
• Reduced Heat
• Operates with little to no lubricant
• Easy to Clean

Product Features:

• 9310 Steel Bolt - MPI/HPT Tested
• Bolt is completely coated in Nickel Boron
• Nickel Boron Coated Extractor
• Phosphate Coated Ejector
• Correct Piston Ring Tightness

Detailed Specs:

Coating: Nickel Boron