Sons of Liberty Gun Works Bolt Carrier Group – .223/5.56 NATO

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Sons of Liberty Gun Works NOX9 AR-15 Flash Hider – 9 Ports - Dead Air Sandman Keymount – 1/2×28


Sons of Liberty Gun Works NOX9 AR-15 Flash Hider – 9 Ports – Dead Air Sandman Keymount – 1/2×28

The Best AR-15 BCG Upgrade From Sons Of Liberty Gun Works

The Sons of Liberty Gun Works Bolt Carrier Group is a high-quality BCG upgrade made to the highest standards so it doesn’t fail. Every component of this bolt carrier group has been properly heat-treated and is designed for the reliability and longevity of the rifle.

It is designed to exceed Mil-Spec expectations to ensure the proper function of the rifle and is a great choice if you are building or upgrading an AR-15.

MPI Tested with Durable Manganese Phosphate Coating

The carrier is machined from AISI 8620 aircraft quality steel and features a full-auto profile with a durable manganese phosphate coating while the bolt is made from Carpenter Technology No. 158 Alloy that has been magnetic particle inspected and high pressure tested to ensure there are no hidden cracks and stress points.

It also comes with many advantages like shot peening to help improve strength and even features small improvements like a precision ground gas key interface on the carrier to help secure the gas key in place.


  • Manganese phosphate finish for corrosion resistance
  • HPT and MPI
  • Hard chromed bore and gas key
  • Carpenter Technology 158 alloy bolt (shot peened)
  • 4340 Tool steel extractor (shot peened)
  • S7 Tool steel ejector (shot peened)
  • Full auto profile 8620 alloy carrier
  • 4130 Chromoly gas key with staked hex screws
  • 4340 Chromoly cam pin
  • 8640 steel alloy firing pin with chrome plating
  • Sons of Liberty Battle Flag logo deep laser engraved

Have Questions About this Product?

The AT3 Tactical store has a 90 day no-hassle return policy for products in good condition. You can view the full details of our return policy here.

If you encounter an issue or defect with a product after 90 days of your purchase, you can refer to the manufacturer for a warranty claim. Their policies are below.

SOLGW Warranty

We are happy to replace or refund your money for any defective firearms or parts, including ar15 barrels, bolt carrier group, lower parts kits, or any m4 accessories or rifles. We are dedicated to providing top-quality products to our customers, however, We do not offer refunds on ammunition.


Returns are ONLY accepted for merchandise found defective immediately upon receipt. Sons of Liberty Gun Works will provide YOUR CHOICE of a replacement item (pending availability) or full refund AND pay the return shipping cost on all firearms and accessories found defective upon receipt. For your added convenience, will also arrange for the defective items to be picked up and returned to us by the original shipper.

Contact Details:

  • Telephone: 210-852-2859
  • Email:

Disclaimer: Manufacturer’s warranty is subject to change without prior notice.

Customer Reviews

Based on 1 review
Sons of Liberty gun works bcg

I’ve only taken it to the range once, since ‘receiving’ it. Does it’s job so far. Plays well w/ my Sharps Bros. upper. It’s a nice, quality, 158 carpenter steel bolt. Good price.

Thanks for the review. We're glad you're happy with the BCG.