Shop 115 Deals on 5.56x45mm NATO Upper Receivers

Browse 5.56x45mm NATO Upper Receivers for sale at the lowest prices online.

Luth-AR A1 Assembled Upper Receiver w/ A1 Rear Sight Base Assembly, Black - UR-01A - Luth-Ar

Luth-AR A1 Assembled Upper Receiver w/ A1 Rear Sight Base Assembly, Black - UR-01A

MAP (Minimum Advertised Price) means this product is for sale at a lower price than what the manufacturer allows advertised.

Radical .223 Remington Upper with 16" Barrel, Black - RF00325 - Radical Firearms

Radical .223 Remington Upper with 16" Barrel, Black - RF00325

MAP (Minimum Advertised Price) means this product is for sale at a lower price than what the manufacturer allows advertised.

Radical Firearms

Ballistic Advantage Performance Series .223 Rem/5.56 11.3" Carbine Barrel, QPQ - BABL556026F - Ballistic Advantage

Ballistic Advantage Performance Series .223 Rem/5.56 11.3" Carbine Barrel, QPQ - BABL556026F

MAP (Minimum Advertised Price) means this product is for sale at a lower price than what the manufacturer allows advertised.

Ballistic Advantage

Luth-AR A2 Carry Handle Style Stripped Upper Receiver w/A2 Rear Sight Cut, Black - Luth-Ar

Luth-AR A2 Carry Handle Style Stripped Upper Receiver w/A2 Rear Sight Cut, Black

MAP (Minimum Advertised Price) means this product is for sale at a lower price than what the manufacturer allows advertised.

Geissele Automatics Super Duty Mod 1 14.50" Upper 5.56x45mm 1:7 M-LOK Rail Mid-Length with BCG and CH, Black - Tactical Efficiency - 08547B - Geissele

Geissele Automatics Super Duty Mod 1 14.50" Upper 5.56x45mm 1:7 M-LOK Rail Mid-Length with BCG and CH, Black - Tactical Efficiency - 08547B

MAP (Minimum Advertised Price) means this product is for sale at a lower price than what the manufacturer allows advertised.

SilencerCo SCO15, Stripped Upper Receiver, .223 Remington/556NATO, Black - Silencerco

SilencerCo SCO15, Stripped Upper Receiver, .223 Remington/556NATO, Black

MAP (Minimum Advertised Price) means this product is for sale at a lower price than what the manufacturer allows advertised.

Daniel Defense M4A1 14.5" Pinned 5.56x45mm Upper Receiver, FDE - 23-004-13150 - Daniel Defense

Daniel Defense M4A1 14.5" Pinned 5.56x45mm Upper Receiver, FDE - 23-004-13150

MAP (Minimum Advertised Price) means this product is for sale at a lower price than what the manufacturer allows advertised.

Geissele Automatics Super Duty Mod 1 16" Upper 5.56x45mm 1:7 M-LOK Rail with BCG and CH, Black - Reliable Performance - 08-548B - Geissele

Geissele Automatics Super Duty Mod 1 16" Upper 5.56x45mm 1:7 M-LOK Rail with BCG and CH, Black - Reliable Performance - 08-548B

MAP (Minimum Advertised Price) means this product is for sale at a lower price than what the manufacturer allows advertised.

Daniel Defense DDM4V7 Lightweight 16" 5.56 AR-15 Upper, Black - 23-128-02932-047 - Daniel Defense

Daniel Defense DDM4V7 Lightweight 16" 5.56 AR-15 Upper, Black - 23-128-02932-047

MAP (Minimum Advertised Price) means this product is for sale at a lower price than what the manufacturer allows advertised.

Spike's Tactical Generation 2, Billet, Upper, 223 Remington, 556NATO, Black, Mil-Spec Barrel Nut - Spikes Tactical

Spike's Tactical Generation 2, Billet, Upper, 223 Remington, 556NATO, Black, Mil-Spec Barrel Nut

$283.99 $208.99

Spikes Tactical

Aero Precision M4E1-T Upper 5.56 10.5 Barrel No BCG/CH - Aero Precision

Aero Precision M4E1-T Upper 5.56 10.5 Barrel No BCG/CH

MAP (Minimum Advertised Price) means this product is for sale at a lower price than what the manufacturer allows advertised.

Midwest Industries Upper Upper 223 Remington 556NATO 10.5" Black MLOK AR-15 - Midwest Industries

Midwest Industries Upper Upper 223 Remington 556NATO 10.5" Black MLOK AR-15

MAP (Minimum Advertised Price) means this product is for sale at a lower price than what the manufacturer allows advertised.

Midwest Industries

Ballistic Advantage Performance Series Barrel 556NATO 12.3" Black Gas Block - Ballistic Advantage

Ballistic Advantage Performance Series Barrel 556NATO 12.3" Black Gas Block

MAP (Minimum Advertised Price) means this product is for sale at a lower price than what the manufacturer allows advertised.

Ballistic Advantage

Sons of Liberty Gun Works .223 Remington Upper with 16" Barrel, Black - PATROLSLUPPER16556 - Sons Of Liberty Gun Works

Sons of Liberty Gun Works .223 Remington Upper with 16" Barrel, Black - PATROLSLUPPER16556

MAP (Minimum Advertised Price) means this product is for sale at a lower price than what the manufacturer allows advertised.

Sons Of Liberty Gun Works

FightLite Raptor Dual Feed Upper 16.25" Fits All MIL-SPEC AR-15, M16, and M4 Lowers, 100 Links Included - RPTR-001 - Fightlite

FightLite Raptor Dual Feed Upper 16.25" Fits All MIL-SPEC AR-15, M16, and M4 Lowers, 100 Links Included - RPTR-001

MAP (Minimum Advertised Price) means this product is for sale at a lower price than what the manufacturer allows advertised.

Ballistic Advantage Classic Series 10.3" AR-15 Barrel, 5.56x45mm - BABL557103MC - Ballistic Advantage

Ballistic Advantage Classic Series 10.3" AR-15 Barrel, 5.56x45mm - BABL557103MC

MAP (Minimum Advertised Price) means this product is for sale at a lower price than what the manufacturer allows advertised.

Ballistic Advantage

Geissele Automatics Super Duty Mod 1 16" Upper 5.56x45mm 1:7 M-LOK Rail with BCG and CH, Desert Dirt - Precision Build - 08-548S - Geissele

Geissele Automatics Super Duty Mod 1 16" Upper 5.56x45mm 1:7 M-LOK Rail with BCG and CH, Desert Dirt - Precision Build - 08-548S

MAP (Minimum Advertised Price) means this product is for sale at a lower price than what the manufacturer allows advertised.

Battle Arms WORKHORSE AR-15 Upper Receiver, 16" Barrel, No BCG or Charging Handle - Battle Arms Development

Battle Arms WORKHORSE AR-15 Upper Receiver, 16" Barrel, No BCG or Charging Handle

MAP (Minimum Advertised Price) means this product is for sale at a lower price than what the manufacturer allows advertised.

Battle Arms Development

Luth-AR 24" Bull Barrel Complete Upper Assembly For 223 Rem/556NATO Keymod, Black - FTBL-B24 - Luth-Ar

Luth-AR 24" Bull Barrel Complete Upper Assembly For 223 Rem/556NATO Keymod, Black - FTBL-B24

MAP (Minimum Advertised Price) means this product is for sale at a lower price than what the manufacturer allows advertised.

FightLite MCR Mission Configurable Rifle - Fightlite

FightLite MCR Mission Configurable Rifle

MAP (Minimum Advertised Price) means this product is for sale at a lower price than what the manufacturer allows advertised.

Geissele Automatics Super Duty Mod 1 14.50" Upper 5.56x45mm 1:7 M-LOK Rail Mid-Length with BCG and CH, Desert Dirt - High Durability - 08547S - Geissele

Geissele Automatics Super Duty Mod 1 14.50" Upper 5.56x45mm 1:7 M-LOK Rail Mid-Length with BCG and CH, Desert Dirt - High Durability - 08547S

MAP (Minimum Advertised Price) means this product is for sale at a lower price than what the manufacturer allows advertised.

Sons of Liberty Gun Works .223 Remington Upper with 16" Barrel, Black - EXO3UPPER16556 - Sons Of Liberty Gun Works

Sons of Liberty Gun Works .223 Remington Upper with 16" Barrel, Black - EXO3UPPER16556

MAP (Minimum Advertised Price) means this product is for sale at a lower price than what the manufacturer allows advertised.

Sons Of Liberty Gun Works

Aero Precision M4E1-T Upper Flat Dark Earth 5.56 10.5 Barrel No BCG/CH - Aero Precision

Aero Precision M4E1-T Upper Flat Dark Earth 5.56 10.5 Barrel No BCG/CH

MAP (Minimum Advertised Price) means this product is for sale at a lower price than what the manufacturer allows advertised.

Daniel Defense DDM4V7 5.56x45mm 16" Cold Hammer Forged AR-15 Upper Receiver, Black - 23-128-02339-047 - Daniel Defense

Daniel Defense DDM4V7 5.56x45mm 16" Cold Hammer Forged AR-15 Upper Receiver, Black - 23-128-02339-047

MAP (Minimum Advertised Price) means this product is for sale at a lower price than what the manufacturer allows advertised.

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