Spike's Tactical is a US based AR manufacturer which creates high quality parts, uppers, and complete rifles. Every component is manufactured to Mil-spec standards and is backed by the Spikes Tactical lifetime warranty.

The Spike's Tactical Complete Bolt Carrier Group has the same MIL-SPEC specifications as their standard bolt carrier group but features the superior nickel boron finish. Nickel boron is a more durable finish and is easier to clean, eliminates friction and can run lube free for thousands of rounds. Additionally, the nickel boron BCG is High Pressure Tested (HPT) and Magnetic Particle Inspected (MPI) for even higher quality.

Features and Specifications:
Manufacturer Number: ST5BG03
Spike's Tactical AR-15/M16 Bolt Carrier Group NiB
Caliber: .223 Rem/5.56 NATO/.300 AAC Blackout
Materials: Machined From 8620 Tool Steel (Carrier) And 158 Carpenter Steel (Bolt)
Nickel Boron Coating Inside And Out (Bolt, Carrier, And Gas Key)
Shrouded Firing Pin
Forged MIL-SPEC Gas Key Attached With Grade 8 Hardware And Properly Staked
Bolt Is Shot-Peened And HPT/MPI
MIL-SPEC Extractor Spring, Black Extractor Insert, Viton O-Ring
Tool Steel Extractor
Color: Silver (NiB)

Fits:
AR-15/M16/ .300 Blackout