Spikes

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 Nickel Boron Plated M-16 BCG

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

Bolt

• 9310 Steel
• 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 Nickel Boron Finish

Retaining Pin

Weight: 11.6oz

By ordering United Survival First Aid Kits (Medical Kits) or other products, you warrant that you have received the proper training and required authorization, if applicable, to use said medical products. United Survival assumes no liability for the misuse of any product or kit. You must know and understand your local/ state laws.

United Survival reserves the right to replace/switch any product with one of equal quality or value at any time at our discretion.

Descriptions on this website (unitedsurvivalstore.com) or any affiliate website are intended only to describe the products, and should not be construed as medical advice. Consult your healthcare provider for any and all medical advice.

WARNING: Cancer and Reproductive Harm

http://www.P65Warnings.ca.gov

We do not ship firearm parts to the following states. If you place an order for firearm parts to be shipped to these states, your order will be canceled and you will be charged a 15% restocking fee. We apologize for the inconvenience of these states' communism. 

• Colorado
• Delaware
• Massachusetts
• Washington D.C
• Hawaii
• Puerto Rico
• Alaska
• Connecticut 
• Illinois 
• Maryland
• New Jersey 
• New York
• Washington