Spikes Tactical ST5BG03 Bolt Carrier Group 5.56 M-16 w/HPT/MPI Bolt - Nickel Boron Finish - ST5BG03

Your Bolt Carrier Group is one of the most critical parts of your build. Don’t buy an imitation. This is the same BCG we use on our builds.

Complete Phosphate M-16 BCG

Phosphate and Nickel Boron Coating Inside and Out (Bolt, Carrier, and Gas Key)

Laser Engraved with ST Spider logo

Mil Spec Carrier

• 8620 Tool Steel
• Full Auto M-16

Mil Spec Bolt

• 158 Carpenter Steel or 9310 Depending on Supply
• Shot Peened
• High Pressure Tested (HPT)
• Magnetic Particle Inspected (MPI)

Mil Spec Extractor

• 8620 Tool Steel
• Nickel Boron Finish
• Extractor Spring
• Black Extractor Insert
• Viton O-Ring

Mil Spec Gas Key

• 8620 Tool Steel
• Grade 8 Hardware
• Properly Staked
• Firing Pin with Hard Chrome Finish
• Cam Pin Phosphate and Nickel Boron Finish
• Retaining Pin
• Weight: 11.6oz

Weight	11.6 oz
Bolt Material	Carpenter 158 Steel
Cartridge Compatibility	.223/5.56 NATO/.300 BLK
Finish	Nickel Boron
Carrier Profile	M16
High Pressure Tested	HP Tested
Magnetic Particle Inspected	Magnetic Partical Inspected
Platform	AR-15
Bolt Finish	Nickel Boron
MPN	ST5BG03
UPC	855319005501