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AR-15 and M4 Upper Assemblies

AR-15 Rifle and M4 Carbine Upper Assemblies by American Spirit Arms. Upper assemblies include forged upper receiver, barrel, bolt, carrier and charging handle with your choice of front iron sight or gas block.
16 Inch M4 Side Charging Upper Assembly
5.56mm AR-15 M4 upper assembly with flat top and 16 inch barrel
$899.99
20 Inch Side Charging Upper Assembly
5.56mm AR-15 flat top upper assembly with 20 inch barrel
$899.99
16 Inch Side Charging Dissipator Upper Assembly
5.56mm AR-15 flat top upper assembly with 16 inch barrel and dissipator...
$949.99
Product is out of stock
10.5 Side Charging M4 Upper Assembly
5.56mm AR-15 M4 flat top upper assembly with 10.5 inch barrel
$899.99
7.5 Inch Side Charging Pistol Upper Assembly
5.56mm AR-15 pistol upper assembly with flat top and 7.5 inch barrel
$949.99
9MM AR-15 M4 Side Charging Upper Assembly Conversion
9mm AR-15 M4 upper assembly with flat top and 16 inch barrel
$999.99
24 Inch A3 AR-15 Bull Barrel Upper Assembly
5.56mm AR-15 Flat Top Upper Assembly with 24 Inch Bull Barrel
$1,499.99
Product is out of stock
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Features and Calibers include:
  • Flat Top
  • Fixed Carry Handle
  • 7.5 Inch Pistol Barrel
  • 10.5 Inch Barrel
  • 16 Inch Barrel
  • 20 Inch Barrel
  • Chrome Moly Barrel
  • Stainless Steel Bull Barrel
  • Dissipator
  • 5.56mm, .223, 9mm