Description:

Nitride coated enhanced bolt and auto carrier for 5.56MM / .223 cartridges. Will also work with 300 AAC blackout. 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!

This is the same bolt carrier groups we use in our Match-Grade line of rifles.

Advantages of Nitride:

• Increased wear-resistance
• Fatigue strength
• Corrosion resistance
• Lubricity
• Cosmetic Appeal
• Heat Treatment
• Inexpensive when compared to nickel coatings

Product Features:

• 9310 Steel Bolt - MPI/HPT Tested - Shot Peened
• 8620 Steel Carrier
• Properly Staked Gas Key
• Nitride Coated Carrier
• Nitride Coated Gas Key
• Correct Piston Ring Tightness
• Heavier M16 (Auto) Carrier

Detailed Specs:

Coating: Nitride

Weight: 11.3 Oz.