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5.56x45 1:7 Receiver Parts

49-72 of 99 Products
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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

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

$749 99 $899.99
In 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

$599 99 $649.99
In Stock
Only 4 Left!
Aero Precision M4E1 Threaded 16" 5.56 Pencil Complete Upper Receiver with ATLAS R-ONE Handguard - Anodized Black - APAR700705M39

Aero Precision M4E1 Threaded 16" 5.56 Pencil Complete Upper Receiver with ATLAS R-ONE Handguard - Anodized Black - APAR700705M39

$594 99
In Stock
Only 2 Left!
Aero Precision AR15 16" 5.56 Mid-Length HBAR QPQ Complete Upper with 13.5" M-LOK Slimline M-LOK - Anodized Black - APSL100677

Aero Precision AR15 16" 5.56 Mid-Length HBAR QPQ Complete Upper with 13.5" M-LOK Slimline M-LOK - Anodized Black - APSL100677

Out of Stock
CMMG 55B8D86-SG Dissent 5.56x45mm 10.50" 7075-T6 Aluminum 9.60" M-LOK Handguard

CMMG 55B8D86-SG Dissent 5.56x45mm 10.50" 7075-T6 Aluminum 9.60" M-LOK Handguard

Out of Stock
Aero Precision M4E1 Threaded 16" 5.56 M4 Complete Upper Receiver with 15" ATLAS R-ONE Handguard - Cerakote FDE - APAR700715M6

Aero Precision M4E1 Threaded 16" 5.56 M4 Complete Upper Receiver with 15" ATLAS R-ONE Handguard - Cerakote FDE - APAR700715M6

Out of Stock
Aero Precision M4E1 Threaded 10.5" 5.56 No Forward Assist Complete Upper Receiver w/ 9.2" M-LOK ATLAS R-ONE Handguard - Cerakote FDE - APAR712712M2

Aero Precision M4E1 Threaded 10.5" 5.56 No Forward Assist Complete Upper Receiver w/ 9.2" M-LOK ATLAS R-ONE Handguard - Cerakote FDE - APAR712712M2
Out of Stock
Aero Precision M4E1 Threaded 12.5" 5.56 Carbine Length Complete Upper Receiver w/ ATLAS R-ONE Handguard - Anodized Black - APAR700704M30

Aero Precision M4E1 Threaded 12.5" 5.56 Carbine Length Complete Upper Receiver w/ ATLAS R-ONE Handguard - Anodized Black - APAR700704M30

Out of Stock
Aero Precision M4E1 Threaded 7.5" 5.56 Complete Upper Receiver with 7" M-LOK ATLAS R-ONE Handguard - FDE Cerakote - APAR700711M0

Aero Precision M4E1 Threaded 7.5" 5.56 Complete Upper Receiver with 7" M-LOK ATLAS R-ONE Handguard - FDE Cerakote - APAR700711M0

Out of Stock
Aero Precision M4E1 Enhanced Complete Upper, 13.9" 5.56 CMV Mid-Length Barrel with 12.7" Enhanced M-LOK Handguard - Anodized Black - APAR600217M99

Aero Precision M4E1 Enhanced Complete Upper, 13.9" 5.56 CMV Mid-Length Barrel with 12.7" Enhanced M-LOK Handguard - Anodized Black - APAR600217M99

Out of Stock
Aero Precision AR15 Complete Upper with 16" 5.56 Mid-Length Heavy QPQ Barrel & 15" ATLAS R-ONE M-LOK Handguard - OD Green Anodized - BLEM - APSL100479B

Aero Precision AR15 Complete Upper with 16" 5.56 Mid-Length Heavy QPQ Barrel & 15" ATLAS R-ONE M-LOK Handguard - OD Green Anodized - BLEM - APSL100479B

Out of Stock
Aero Precision M4E1 Threaded 7.5" 5.56 Complete Upper Receiver with 7" M-LOK ATLAS R-ONE Handguard - Anodized Black - APAR700701M0

Aero Precision M4E1 Threaded 7.5" 5.56 Complete Upper Receiver with 7" M-LOK ATLAS R-ONE Handguard - Anodized Black - APAR700701M0

Out of Stock
Aero Precision M4E1 Threaded Complete Upper, 14.5" 5.56 Mid-Length Barrel with Pinned Gamma 556 SL, 12" M-LOK ATLAS R-ONE Handguard - Anodized Black - APAR700704M5V38

Aero Precision M4E1 Threaded Complete Upper, 14.5" 5.56 Mid-Length Barrel with Pinned Gamma 556 SL, 12" M-LOK ATLAS R-ONE Handguard - Anodized Black - APAR700704M5V38

Out of Stock
Aero Precision M4E1 Enhanced 10.5" 5.56 Complete Upper Receiver with Pinned FSB and 7" Quad Rail Handguard - Anodized Black - APAR640211Q3

Aero Precision M4E1 Enhanced 10.5" 5.56 Complete Upper Receiver with Pinned FSB and 7" Quad Rail Handguard - Anodized Black - APAR640211Q3

Out of Stock
Aero Precision M4E1 Threaded 10.5" 5.56 No Forward Assist Complete Upper Receiver with 9.2" M-LOK ATLAS S-ONE Handguard - Cerakote FDE - APAR712112M2

Aero Precision M4E1 Threaded 10.5" 5.56 No Forward Assist Complete Upper Receiver with 9.2" M-LOK ATLAS S-ONE Handguard - Cerakote FDE - APAR712112M2

Out of Stock
Aero Precision AR15 Complete Upper with No Forward Assist, 11.5" 5.56 Barrel, 9" M-LOK ATLAS S-ONE Handguard - Anodized Black - APAR610502M29

Aero Precision AR15 Complete Upper with No Forward Assist, 11.5" 5.56 Barrel, 9" M-LOK ATLAS S-ONE Handguard - Anodized Black - APAR610502M29

Out of Stock
Aero Precision M4E1 Enhanced 20" 5.56 Rifle Length Complete Upper Receiver with 15" Quad Rail - Cerakote FDE - APAR640252Q48

Aero Precision M4E1 Enhanced 20" 5.56 Rifle Length Complete Upper Receiver with 15" Quad Rail - Cerakote FDE - APAR640252Q48
Out of Stock
Aero Precision M4E1 Threaded 16" 5.56 Mid-Length Complete Upper w/ 15" ATLAS R-ONE, VG6 Gamma 556, BREACH Charging Handle, 5.56 BCG - FDE Cerakote - APSL100351

Aero Precision M4E1 Threaded 16" 5.56 Mid-Length Complete Upper w/ 15" ATLAS R-ONE, VG6 Gamma 556, BREACH Charging Handle, 5.56 BCG - FDE Cerakote - APSL100351

Out of Stock
Knights 31963 Upper Recver KIT SR15 CQB MOD2 11.5"

Knights 31963 Upper Recver KIT SR15 CQB MOD2 11.5"

Out of Stock
Aero Precision M4E1 Threaded 14.5" 5.56 Mid-Length Complete Upper Receiver w/ ATLAS R-ONE Handguard -Cerakote FDE - APAR700714M5

Aero Precision M4E1 Threaded 14.5" 5.56 Mid-Length Complete Upper Receiver w/ ATLAS R-ONE Handguard -Cerakote FDE - APAR700714M5

Out of Stock
Aero Precision M4E1 Threaded 14.5" 5.56 Mid-Length Complete Upper Receiver w/ ATLAS R-ONE Handguard - Anodized Black - APAR700704M5

Aero Precision M4E1 Threaded 14.5" 5.56 Mid-Length Complete Upper Receiver w/ ATLAS R-ONE Handguard - Anodized Black - APAR700704M5
Out of Stock
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

Out of Stock
Aero Precision M4E1 Threaded 10.5" 5.56 No Forward Assist Complete Upper Receiver w/ 9.2" M-LOK ATLAS R-ONE Handguard - Anodized Black - APAR712702M2

Aero Precision M4E1 Threaded 10.5" 5.56 No Forward Assist Complete Upper Receiver w/ 9.2" M-LOK ATLAS R-ONE Handguard - Anodized Black - APAR712702M2
Out of Stock
Aero Precision M4E1 Threaded 12.5" 5.56 Carbine Length Complete Upper Receiver w/ ATLAS R-ONE Handguard - Cerakote FDE - APAR700714M30

Aero Precision M4E1 Threaded 12.5" 5.56 Carbine Length Complete Upper Receiver w/ ATLAS R-ONE Handguard - Cerakote FDE - APAR700714M30

Out of Stock
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