Sons of Liberty Gun Works M4-EXO3 13.7 Inch Pinned and Welded Complete 5.56 NATO Upper Receiver

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


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

SOLGW Complete Upper with EXO3 Handguard and NOX Flash Hider

This complete AR-15 upper has a more economical price, with all the great components that really matter. This complete upper has a 13.7 inch barrel, pinned with a NOX flash hider to meet a 16 inch legal length, and has Dead Air Keymount compatibility. The cost savings comes with the EXO3 M-LOK handguard, which features a steel barrel nut for added rigidity for accessories.

Bolt carrier and charging handle sold separately. You can get a SOLGW BCG and Charging Handle here!


  • 13.7″ pinned and welded to 16″ with NOX Keymo Flash Hider
  • 13 Inch EXO3 M-LOK Handguard with Steel Barrel Nut
  • Midlength gas system
  • Forged 7075-T6 upper receiver


  • Fit: AR-15
  • Caliber: .223/5.56 NATO
  • Barrel Length: 13.7″
  • Barrel Contour: Government
  • Barrel Finish: Nitride
  • Barrel Twist Rate: 1:7
  • Gas System Length: Midlength
  • Muzzle Device: NOX Keymo Flash Hider
  • Handguard: 13 Inch EXO3 M-LOK Handguard
  • Finish: Hard Coat Anodized

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
Christopher Thalasinos

Sons of Liberty Gun Works M4-EXO3 13.7 Inch Pinned and Welded Complete 5.56 NATO Upper Receiver

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