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.
M4A3 16 Inch AR-15 M4 Upper Assembly
5.56mm AR-15 M4 upper assembly with flat top and 16 inch barrel
$849.99
$749.99
16 Inch M4A2 AR-15 M4 Upper Assembly
5.56mm AR-15 M4 upper assembly with fixed carry handle and 16 inch barrel
$889.99
$799.99
20 Inch A2 AR-15 Upper Assembly
5.56mm AR-15 upper assembly with fixed carry handle and 20 inch barrel
$889.99
20 Inch A3 AR-15 Upper Assembly
5.56mm AR-15 flat top upper assembly with 20 inch barrel
$849.99
16 Inch A2 Dissipator AR-15 Upper Assembly
5.56mm AR-15 upper assembly with fixed carry handle, 16 inch barrel and...
$929.99
Product is out of stock
16 Inch A3 Dissipator AR-15 Upper Assembly
5.56mm AR-15 flat top upper assembly with 16 inch barrel and dissipator...
$889.99
Product is out of stock
10.5 Inch A3 AR-15 M4 Upper Assembly
5.56mm AR-15 M4 flat top upper assembly with 10.5 inch barrel
$849.99
$799.99
7.5 Inch AR-15 Pistol Upper Assembly
5.56mm AR-15 pistol upper assembly with flat top and 7.5 inch barrel
$899.99
$799.99
7.5 Inch AR-15 Pistol Upper Assembly with Handguard
5.56mm AR-15 pistol flat top upper assembly with 7.5 inch barrel and handguard
$849.99
$799.99
9MM A2 AR-15 M4 Upper Assembly Conversion
9mm AR-15 M4 upper assembly with fixed carry handle and 16 inch barrel
$1,045.99
$999.99
9MM AR-15 M4 Flat Top Upper Assembly Conversion
9mm AR-15 M4 upper assembly with flat top and 16 inch barrel
$1,025.99
24 Inch A3 AR-15 Bull Barrel Upper Assembly
5.56mm AR-15 Flat Top Upper Assembly with 24 Inch Bull Barrel
$1,300.00
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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