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5.56x45 AR-15 Upper Receivers

1-24 of 161 Products
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Aero Precision M4E1 Enhanced Complete Upper, 16" 5.56 HBAR MID-Length Barrel with 15" Enhanced Quad Rail Handguard - Cerakote FDE - APAR600224Q97
$429 99 $619.99
In Stock
Only 4 Left!
Aero Precision M4E1 Threaded 16" 5.56x45mm Mid-Length Complete Upper Receiver with ATLAS S-ONE Handguard - OD Green Anodized - APAR700179M7
$459 99 $589.99
In Stock
Only 1 Left!
Aero Precision M4E1 Threaded Complete Upper, 13.9" 5.56x45mm CMV Mid-Length Barrel with 12.7" ATLAS R-ONE M-LOK Handguard - Anodized Black - APAR700704M99
$359 99 $574.99
In Stock
Only 5 Left!
Aero Precision M4E1 Enhanced 14.5" 5.56 M4 Carbine Length Barrel Complete Upper Receiver - Anodized Black - APAR640231M32
$359 99 $564.99
In Stock
Only 5 Left!
Aero Precision M4E1 Threaded Complete Upper, 12.5" 5.56 Carbine Length Barrel, 10.3" M-LOK ATLAS S-ONE Handguard - Anodized Black - APAR700103M30
$399 99 $554.99
In Stock
Only 1 Left!
Aero Precision M4E1 Threaded 14.5" 5.56 Mid-Length QPQ No Forward Assist Complete Upper with 13.5" Slimline Handguard - Kodiak Brown Anodized - APSL100753
$419 99 $534.99
In Stock
Only 1 Left!
Aero Precision M4E1 Threaded PRO Complete Upper with 13.7" 5.56 CHF Mid-Length Barrel and 12.7" ATLAS R-ONE Handguard - Anodized Black - APUG700704M104-1
$649 99 $1,004.99
In Stock
Only 2 Left!
Aero Precision M4E1 Enhanced Gas Piston Complete Upper with 16" 5.56 M4 Carbine Length Barrel & 15" Enhanced M-LOK Handguard - Anodized Black - APAR100218M73
$739 99 $799.99
In Stock
Only 2 Left!
Aero Precision Threaded PRO Complete Upper, 16.3" 5.56 CHF Mid-Length Barrel with 15" ATLAS R-ONE M-LOK Handguard - Kodiak Brown Anodized - APUG700401M103-1
$689 99 $1,029.99
In Stock
Only 3 Left!
Aero Precision M4E1 Threaded PRO Complete Upper, 16.3" 5.56 CHF Mid-Length Barrel with 15" ATLAS S-ONE M-LOK Handguard - Kodiak Brown Anodized - APUG700392M103-1
$729 99 $1,029.99
In Stock
Only 3 Left!
Aero Precision M4E1 Threaded Complete Upper, 11.5" 5.56 Barrel, 10.3" ATLAS R-ONE M-LOK HG - Kodiak Brown Anodized - APAR700397M29
$479 99 $549.99
In Stock
Only 2 Left!
Aero Precision M4E1 Enhanced Gas Piston Complete Upper with 14.5" 5.56 Mid-Length Barrel & 12.7" Enhanced M-LOK Handguard - Anodized Black - APAR100217M72
$729 99 $899.99
In Stock
Only 6 Left!
Aero Precision M4E1 Threaded 16" 5.56x45mm Mid-Length Complete Upper Receiver with ATALS S-ONE Handguard - Kodiak Brown Anodized - APAR700392M7
$499 99 $589.99
In Stock
Only 3 Left!
Aero Precision M4E1 Threaded PRO Complete Upper with 16.3" 5.56 CHF Mid-Length Barrel and 15" ATLAS S-ONE Handguard - Anodized Black - APUG700105M103-1
$639 99 $1,029.99
In Stock
Only 3 Left!
Aero Precision M4E1 Enhanced 16" 5.56 Mid-Length Complete Upper Receiver with 15" Quad Rail Handguard - Anodized Black - APAR640251Q7
$399 99 $589.99
In Stock
Only 2 Left!
Aero Precision M4E1 Threaded Complete Upper, 14.5" 5.56 Carbine Length Barrel, 12" M-LOK ATLAS S-ONE Handguard - Anodized Black - APAR700304M32
$364 99 $564.99
In Stock
Only 3 Left!
1-24 of 161 Products
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