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Semi-Auto Upper Receivers

25-48 of 61 Products
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Aero Precision M4E1 Builder Set with 7" Enhanced Quad Rail Handguard - Anodized Black - APCS100199

Aero Precision M4E1 Builder Set with 7" Enhanced Quad Rail Handguard - Anodized Black - APCS100199

Out of Stock
Aero Precision M5 (.308) Threaded Assembled Receiver Set - Sniper Grey Cerakote - APCS308161

Aero Precision M5 (.308) Threaded Assembled Receiver Set - Sniper Grey Cerakote - APCS308161

Out of Stock
Aero Precision M4E1 Threaded Assembled Receiver Set - OD Green Cerakote - APCS100827

Aero Precision M4E1 Threaded Assembled Receiver Set - OD Green Cerakote - APCS100827

Out of Stock
Aero Precision EPC-9 Receiver Set - Sniper Grey Cerakote - APCS620039

Aero Precision EPC-9 Receiver Set - Sniper Grey Cerakote - APCS620039

Out of Stock
Aero Precision M5E1 Complete Upper, 16" .308 Mid-Length Barrel w/ 15" Enhanced M-LOK Handguard & Adjustable Gas Block - Kodiak Brown Anodized - APSL100611

Aero Precision M5E1 Complete Upper, 16" .308 Mid-Length Barrel w/ 15" Enhanced M-LOK Handguard & Adjustable Gas Block - Kodiak Brown Anodized - APSL100611

Out of Stock
Aero Precision M4E1 Builder Set with 15" ATLAS R-ONE Handguard - Kodiak Brown Anodized - APCS100960

Aero Precision M4E1 Builder Set with 15" ATLAS R-ONE Handguard - Kodiak Brown Anodized - APCS100960

Out of Stock
Aero Precision M4E1 Builder Set with 15" ATLAS R-ONE Handguard - OD Green Anodized - APCS100961

Aero Precision M4E1 Builder Set with 15" ATLAS R-ONE Handguard - OD Green Anodized - APCS100961
Out of Stock
Aero Precision AR15 Complete Upper with 12.5" 5.56 Carbine Length Barrel & 10.3" ATLAS R-ONE Handguard - Sniper Grey Anodized with Stripped Lower Receiver - APSL100561S

Aero Precision AR15 Complete Upper with 12.5" 5.56 Carbine Length Barrel & 10.3" ATLAS R-ONE Handguard - Sniper Grey Anodized with Stripped Lower Receiver - APSL100561S

Out of Stock
Aero Precision AR15 Complete Upper with 8" 5.56 Pistol Length QPQ Barrel & 7.3" ATLAS S-ONE Handguard - Sniper Grey Cerakote with Stripped Lower Receiver - APSL100559S

Aero Precision AR15 Complete Upper with 8" 5.56 Pistol Length QPQ Barrel & 7.3" ATLAS S-ONE Handguard - Sniper Grey Cerakote with Stripped Lower Receiver - APSL100559S

Out of Stock
Aero Precision AR15 Complete Upper with 8" .300 Blackout Pistol Length QPQ Barrel & 7.3" ATLAS S-ONE - Sniper Grey Cerakote with Stripped Lower Receiver - APSL100563S

Aero Precision AR15 Complete Upper with 8" .300 Blackout Pistol Length QPQ Barrel & 7.3" ATLAS S-ONE - Sniper Grey Cerakote with Stripped Lower Receiver - APSL100563S

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
Stag Arms STAG 15 Tactical Complete Right Handed AR-15 Upper Receiver, 10.5" Black Nitride Barrel with Aero Precision BREACH Charging Handle & BCG - STAG15100312L

Stag Arms STAG 15 Tactical Complete Right Handed AR-15 Upper Receiver, 10.5" Black Nitride Barrel with Aero Precision BREACH Charging Handle & BCG - STAG15100312L
Out of Stock
Aero Precision M5E1 Complete Upper, 16" .308 Mid-Length Barrel w/ 15" Enhanced M-LOK Handguard & Adjustable Gas Block - Anodized Black - APSL100619

Aero Precision M5E1 Complete Upper, 16" .308 Mid-Length Barrel w/ 15" Enhanced M-LOK Handguard & Adjustable Gas Block - Anodized Black - APSL100619
Out of Stock
Nemo Arms BL556RS 556 AR15 Matched Billet Receiver SET

Nemo Arms BL556RS 556 AR15 Matched Billet Receiver SET

Out of Stock
Aero Precision M4E1 Builder Set with 12" ATLAS R-ONE Handguard - Cerakote FDE - APCS100332

Aero Precision M4E1 Builder Set with 12" ATLAS R-ONE Handguard - Cerakote FDE - APCS100332

Out of Stock
CMMG Banshee 300 MK57 Complete Upper Receiver Group Kit 5" Barrel 5.7X28 - Includes (3) 40rd Magazines - 54F18E9

CMMG Banshee 300 MK57 Complete Upper Receiver Group Kit 5" Barrel 5.7X28 - Includes (3) 40rd Magazines - 54F18E9
Out of Stock
CMMG Banshee 300 MKGS Complete Upper Receiver Group Kit 5" Barrel 9mm - Includes (3) 30rd Magazines - 94F17AA

CMMG Banshee 300 MKGS Complete Upper Receiver Group Kit 5" Barrel 9mm - Includes (3) 30rd Magazines - 94F17AA

Out of Stock
ATI Omni Hybrid Stripped Upper and Lower Receiver Set FDE - GLOW200FDEHUP200FDE

ATI Omni Hybrid Stripped Upper and Lower Receiver Set FDE - GLOW200FDEHUP200FDE
Out of Stock
Bushmaster XM-15 Complete 5.56x45mm Upper Receiver 16" Barrel - 00-400003-BLK

Bushmaster XM-15 Complete 5.56x45mm Upper Receiver 16" Barrel - 00-400003-BLK
Out of Stock
Aero Precision - M4E1 Threaded Complete Upper - Semi-auto - 16" SS Barrel - .223 Wylde - Anodized Black - APAR700305M9

Aero Precision - M4E1 Threaded Complete Upper - Semi-auto - 16" SS Barrel - .223 Wylde - Anodized Black - APAR700305M9
Out of Stock
Aero Precision EPC-9 Receiver Set Anodized Black - APCS620001

Aero Precision EPC-9 Receiver Set Anodized Black - APCS620001
Out of Stock
Aero Precision M4E1 Threaded Assembled Receiver Set, Special Edition: Betsy Ross - Anodized Black - APCS100731

Aero Precision M4E1 Threaded Assembled Receiver Set, Special Edition: Betsy Ross - Anodized Black - APCS100731
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 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
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