Description:

Nickel boron coated bolt and auto carrier for 6.8 SPCII cartridges. High quality mil-spec+ with properly staked gas key. 9310 steel bolt with an 8620 steel carrier. Tight piston rings for correct function and virtually no gas leakage. MPI tested bolt. A pristine and reliable BCG 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
• 8620 Steel Carrier
• Properly Staked Gas Key
• Nickel Boron Lined Carrier
• Nickel Boron Lined Gas Key
• Nickel Boron Firing Pin
• Correct Piston Ring Tightness
• Heavier M16 (Auto) Carrier

Detailed Specs:

Coating: Nickel Boron

Weight: 11.7 Oz.