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5.56x45 AR-15 Receiver Parts

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Aero Precision M4E1 Threaded Complete Upper, 13.9" 5.56x45mm CMV Mid-Length Barrel with 12.7" ATLAS S-ONE M-LOK Handguard - Cerakote FDE - APAR700114M99

Aero Precision M4E1 Threaded Complete Upper, 13.9" 5.56x45mm CMV Mid-Length Barrel with 12.7" ATLAS S-ONE M-LOK Handguard - Cerakote FDE - APAR700114M99

$609 99
In Stock
Only 5 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

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

$574 99
In Stock
Aero Precision M4E1 Threaded 16" 5.56x45mm Mid-Length Complete Upper Receiver with ATALS S-ONE Handguard - Kodiak Brown Anodized - APAR700392M7

Aero Precision M4E1 Threaded 16" 5.56x45mm Mid-Length Complete Upper Receiver with ATALS S-ONE Handguard - Kodiak Brown Anodized - APAR700392M7

$589 99
In Stock
Only 4 Left!
Aero Precision M4E1 Threaded Complete Upper, 11.5" 5.56 Barrel, 10.3" ATLAS R-ONE M-LOK HG - ODG Anodized - APAR700396M29

Aero Precision M4E1 Threaded Complete Upper, 11.5" 5.56 Barrel, 10.3" ATLAS R-ONE M-LOK HG - ODG Anodized - APAR700396M29

$549 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

Aero Precision M4E1 Threaded Complete Upper, 11.5" 5.56 Barrel, 10.3" ATLAS R-ONE M-LOK HG - Kodiak Brown Anodized - APAR700397M29

$549 99
In Stock
Only 3 Left!
Gemtech 13833 Gvac Upper Receiver 5.56x45mm NATO 16.10", Black, 15" M-LOK Handguard, ETM Flash Hider, BCG Included

Gemtech 13833 Gvac Upper Receiver 5.56x45mm NATO 16.10", Black, 15" M-LOK Handguard, ETM Flash Hider, BCG Included

$741 16
In Stock
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Spikes Tactical Midlength Complete 5.56x45mm NATO 16", Black, 12" Picatinny Handguard, A2 Flash Hider

Spikes Tactical Midlength Complete 5.56x45mm NATO 16", Black, 12" Picatinny Handguard, A2 Flash Hider

$790 22
In Stock
Only 1 Left!
Sons of Liberty M4-89-14.5 M4-89 14.5" Rifle 556NATO 30rd

Sons of Liberty M4-89-14.5 M4-89 14.5" Rifle 556NATO 30rd

$1913 47
In Stock
Aero Precision M4E1 Threaded 11.5" 5.56 NATO No Forward Assist Complete Upper w/ 10.3" M-LOK ATLAS R-ONE Handguard - Kodiak Brown Anodized - APSL100626

Aero Precision M4E1 Threaded 11.5" 5.56 NATO No Forward Assist Complete Upper w/ 10.3" M-LOK ATLAS R-ONE Handguard - Kodiak Brown Anodized - APSL100626

$399 99 $499.99
In Stock
Only 3 Left!
Aero Precision M4E1 Threaded 13.9" 5.56 Mid-Length No Forward Assist Complete Upper with 12.7" M-LOK ATLAS R-ONE Handguard - Anodized Black - APSL100634

Aero Precision M4E1 Threaded 13.9" 5.56 Mid-Length No Forward Assist Complete Upper with 12.7" M-LOK ATLAS R-ONE Handguard - Anodized Black - APSL100634

$399 99 $549.99
In Stock
Only 5 Left!
Aero Precision M4E1 Threaded Complete Upper, 14.5" 5.56 Carbine Length Barrel, 12" M-LOK ATLAS S-ONE Handguard - FDE Cerakote - APAR700314M32

Aero Precision M4E1 Threaded Complete Upper, 14.5" 5.56 Carbine Length Barrel, 12" M-LOK ATLAS S-ONE Handguard - FDE Cerakote - APAR700314M32

$604 99
In Stock
Only 1 Left!
Aero Precision M4E1 Threaded Complete Upper, 16" 5.56 M4 Barrel, 15" M-LOK ATLAS S-ONE Handguard - Anodized Black - APAR700305M6

Aero Precision M4E1 Threaded Complete Upper, 16" 5.56 M4 Barrel, 15" M-LOK ATLAS S-ONE Handguard - Anodized Black - APAR700305M6

$579 99
In Stock
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Aero Precision M4E1 Threaded Complete Upper, 16" 5.56 Mid Pencil Length Barrel, 15" M-LOK ATLAS S-ONE Handguard - Anodized Black - APAR700305M39

Aero Precision M4E1 Threaded Complete Upper, 16" 5.56 Mid Pencil Length Barrel, 15" M-LOK ATLAS S-ONE Handguard - Anodized Black - APAR700305M39

$594 99
In Stock
Only 1 Left!
Aero Precision AR15 16" 5.56 Carbine-Length M4 CHM/PH Barrel Complete Upper 13" Slimline Handguard Left Handed - Anodized Black - APSL100709

Aero Precision AR15 16" 5.56 Carbine-Length M4 CHM/PH Barrel Complete Upper 13" Slimline Handguard Left Handed - Anodized Black - APSL100709

$449 99 $549.99
In Stock
Only 4 Left!
Aero Precision AR15 14.5" 5.56 Mid-Length Gov QPQ Barrel Complete Upper 13.5" Slimline Left Handed - Anodized Black - APSL100710

Aero Precision AR15 14.5" 5.56 Mid-Length Gov QPQ Barrel Complete Upper 13.5" Slimline Left Handed - Anodized Black - APSL100710

$399 99 $499.99
In Stock
Only 4 Left!
Aim Sports AR5CUB3 Complete Upper Assembly 5.56x45mm NATO 16" Black Nitride Barrel 7075-T6 Aluminum Black Hard Coat Anodized Receiver 15" M-LOK Free-Float Handguard for AR-15

Aim Sports AR5CUB3 Complete Upper Assembly 5.56x45mm NATO 16" Black Nitride Barrel 7075-T6 Aluminum Black Hard Coat Anodized Receiver 15" M-LOK Free-Float Handguard for AR-15

$359 99
In Stock
Sons of Liberty M489UPPER13.7556 M4-89 Upper 556 13.7

Sons of Liberty M489UPPER13.7556 M4-89 Upper 556 13.7

$950 00
In Stock
Only 3 Left!
Sons of Liberty M4L89BSUPPER-14.5-CHF-556 Upper 14.5 556

Sons of Liberty M4L89BSUPPER-14.5-CHF-556 Upper 14.5 556

$1318 79
In Stock
Only 3 Left!
Sons of Liberty M4L89BSUPPER-14.5-CHF-556-HUX Upper 14.5 556

Sons of Liberty M4L89BSUPPER-14.5-CHF-556-HUX Upper 14.5 556

$1318 79
In Stock
Only 2 Left!
Aero Precision M4E1 Threaded 16" 5.56x45mm Mid-Length Complete Upper Receiver with ATALS R-ONE Handguard - Kodiak Brown Anodized - APAR700401M7

Aero Precision M4E1 Threaded 16" 5.56x45mm Mid-Length Complete Upper Receiver with ATALS R-ONE Handguard - Kodiak Brown Anodized - APAR700401M7
Out of Stock
Aero Precision M4E1 Threaded 10.5" 5.56 Carbine No Forward Assist Complete Upper wtih 9.3" M-LOK ATLAS S-ONE Handguard - OD Green Anodized - APSL100625

Aero Precision M4E1 Threaded 10.5" 5.56 Carbine No Forward Assist Complete Upper wtih 9.3" M-LOK ATLAS S-ONE Handguard - OD Green Anodized - APSL100625

Out of Stock
Aero Precision M4E1 Threaded 10.5" 5.56 Carbine Complete Upper with 9.3" ATLAS S-ONE, VG6 Epsilon 556, BREACH Charging Handle, 5.56 BCG - Anodized Black - APSL100415

Aero Precision M4E1 Threaded 10.5" 5.56 Carbine Complete Upper with 9.3" ATLAS S-ONE, VG6 Epsilon 556, BREACH Charging Handle, 5.56 BCG - Anodized Black - APSL100415

Out of Stock
Radical Firearms Complete Upper 16" 5.56 M4 Profile w/ 12" FGS Round Rail

Radical Firearms Complete Upper 16" 5.56 M4 Profile w/ 12" FGS Round Rail
Out of Stock
AR-15 Drop In Ready Enhanced Complete Upper w/ 16" M4 223 - 5.56 Barrel, 12" Free Float Keymod Fore End by Riley Defense

AR-15 Drop In Ready Enhanced Complete Upper w/ 16" M4 223 - 5.56 Barrel, 12" Free Float Keymod Fore End by Riley Defense
Out of Stock
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