Description:

Black phosphate bolt and semi 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!

Product Features:

• 9310 Steel Bolt - MPI/HPT Tested
• 8620 Steel Carrier
• Properly Staked Gas Key
• Chrome Lined Carrier
• Chrome Lined Gas Key
• Correct Piston Ring Tightness
• Lightweight

Detailed Specs:

Coating: Phosphate

Weight: 11.2 Oz.